My personal opinions of each female character we have seen in FFXV:
Cindy: Is problematic, but as Duckroll said, its mostly with how the game itself (ie camera, etc) acts towards her. Nothing wrong with a sexy outfit if it makes sense (which it actually doesn't here, and that concept art that constantly goes around is 1000% better than what they landed on) but how a game treats it is an issue. We see other female NPCs around the same area (or was it 1 Npc... i don't remember) who seems to wear jeans and a tank top. I think that would have fit Cindy better tbh. I do think that we talk about her a bit much though. We really can't add anymore to the conversation about her since I'm pretty sure everything has been said. Not saying we should shut up and deal, just that conversations feel very same-y and circular when she (and Luna, but I'll get to that) is talked about.
Gentiana: She has a really good air to her, from her design and demeanor when we see her. There is so obviously something off about her that sends a tingle down my spine and yet it is definitely not in a villainous way. She seems like the kind of person who is secretly dangerous or very special and I like that a lot. Love her design, and love her almost sage like presence even though she is "Luna's attendant".
Aranea: Discussion relating to this character is extremely baffling to me tbh. Almost all of the arguing of her character or design is outdated and extremely old stuff that has either been rectified, edited, or is gone all together. I think a mod earlier in the thread was talking about 2 highly sexualized female characters, and I think Aranea was the other they were thinking about which is just nuts imo. Seriously, from the latest Pax footage we see how things have changed over the past 5 years with her. She now no longer has exposed thighs, she doesn't poledance in the air (which, if i may, I don't think Nomura meant that as sexy. I think in a sort of Anno way he just thought that looked cool, considering that scene we saw that in didn't feel sexy at all imo, but I digress), and yet she still has extreme presence when she is around. She STILL steal the scene when she comes on, both as being highly competent at fighting and at seeming above those she is fighting too (As is seen as she taunts Noctis prior to the fight we see.) I guess my issue is that people don't focus on how she is now, and instead always focus on the character art sketches and the 2011 V13 trailer.
As for her design, I LOVE it (especially now that the thigh thing is fixed). The hanging robes moving about making her look bigger and more intimidating as she moves, the helmet making her feel like an executioner, the red and black colour scheme is always a plus in my book :3, and I like how the armour plating is segmented with studs around with a red undercoat beneath; feels very industrial. The ONLY thing that I think could have been better is the fact is the cleavage in combat armour (and maybe the slight midriff, but that specifically is a nitpick), but truth be told I can actually overlook that. I honestly don't see how her outfit is in anyway worse to, lets say, Beatrix from FF9 who also emits the same feeling about her of dominance rather than sexiness.
Luna: This one is gonna get complicated so buckle up [and is also subject to change after I watch Kingsglaive

]. I honestly think that many people will joke about "strong character" when this game releases. BUT I really think thats more about people's expectation on what a "strong female character" is, rather than if Luna is actually strong or not. From the trailers, the talks, and how people reacted to Kingsglaive I think I actually get what Tabata was trying to say about why he thinks Luna is "strong". I don't think he means "can get out of shit" or "physically strong" but rather I think he was going for "deterministically strong".
Lets break it down a little. We don't know if she is a party member at all so lets throw out the idea that she can handle herself in a fight. Okay, so: what is her goal? Seemingly its about saving the world and ridding the plague of the stars. Apparently Noctis matters a lot to this goal and he's the one who has to take action to make her goal a reality, so it seems like she's gonna do the set-up to make sure he succeeds. In a way, kind of like an Aaron figure imo. Ever since the Dawn trailer we've seen that she has constantly been dealt shit hands (being beaten, having her country invaded, having to be a god whispering oracle, being beaten again (though to be fair, Noctis does get literally tortured in the same trailer), and also having to prop Noctis' whiny ass through) and yet she has never seen wavering from her ideals and goals. Considering the cards fate gave her and the responsibilities that are thrown on her and considering the opposition in front of her the fact that she can still even breath without so much as an anxious breath, i feel, is quite "strong". I've seen people in this thread talk about her being a foil to Noctis as being a bad thing, but rather I think its a good thing. From what we've seen, she's support for Noctis' journey but may actually be the perfect kind of support character. One who guilds the MC to what they have to do even if the MC could care less. Noctis, more or less, serves as a means to an end for Luna's goals. In a way... Noctis is kinda like Luna's automated multi-tool, i'd say... in a way...
Edit: just for clarity, I want to say that Noctis has been very shaky and lacking determination and motivation in a LOT of stuff we have seen. He seems more like he's just going with things rather than planning into things. Luna is a stark contrast to that and I feel cements Noctis' poorer character points (which may in turn lead to character development). In this way, Luna acts as a emotional version of the X-Zero relationship in Mega Man X (or at least thats the feeling I get from what we have seen

)
Idk, I guess I just think Luna fits into a different kind of strength than people may think. ¯\_(ツ

_/¯
On the topic of "STELLA!!!!":
Can we stop with the idea of Stella being somehow magically a better and more "strong character" than Luna. Its kinda ridiculous since the only strong thing we've seen of the character was in a trailer where it has even been said iirc that those CGI were just "Nomura's ideas" and nothing actually substantive. From the only moments we saw of her in game, she seemed more like a Juliet than anything else. And not the Romeo x Juliet one where she was a vigilante badass, either.
Basically, lets all just move on from FFvs13 and stop thinking about the "what ifs" as the "what would have actuallys".
Also, we may actually want to wait for the game to come out before making blanket statements on anything other than Cindy's attire and its relationship with the camera
Edit2: Shit, forgot about Iris.
So,
Iris: Very obviously trying to be a lil' sister anime archtype even though she is a grown woman. The animations for her in cut-scenes is pretty laughable, but its something I'll deal with. Watching the 50 min video a few times I got used to it. Tbh, I just think they over did the exaggeration in the animation which resulted in her feeling jerky and spazzy. Though that being said some cutscenes she seems fine (like when talking about Luna, or the second option when asked about the whole date comment. ) I honestly feel like if they toned down her animation a bit it'd be fine. Nothing really offensive about her from what I can tell, they just didn't do her quite right. I can learn to deal with it. Really like her outfit though. Especially the ninja print on her cloths :3.