I'll speak on this from the dolphin perspective. I came into this game knowing I wanted a few select units and that I'd go out of my way to get them. They were Lightning and Orlandu. I've got one and the other isn't released in global yet. I knew I was going to have to spend some cash to obtain. This isn't my first rodeo when it comes to gatcha games. Along the way there were a few select units that I wanted as well but did not obtain, Dracu Lasswell and Luneth. I did however get Elza who's IMO one of the best units right now and she's become a staple on my team for the foreseeable future. Chasing rainbows will cost you. It can cost you a little or it can cost you a lot. The choice of the two unfortunately isn't up to you, it's up to RNG. For the most part I've been very lucky when comparing cash spent vs. the units I've obtained. For me the pot has run out. I purchased my home so the excess cash I had is now gone. I'll do a few 11 pulls for Orlandu and possibly 1-2 for Gilgamash as I need the TM or hopefully get a Zidane out of the pot.
When it comes to power creep we all know that's just the nature of these games. I chased Chizuru HARD, never got one until like 2 weeks ago where I pulled 3 lol. Now, Chiz ain't shit and that's only because she doesn't have her 6 star yet. The game is at a point now where 3* are getting 6* form and are closing the gap between whale and F2P. Will it fully close it? Hell no, Gumi needs to make that cash. Coming from Puzzles and Dragons I'm fully aware of what's in store for Trials and such, personally I find this game to be much more forgiving as we've found strats and ways to deal with such things like Maxwell, Golbez, etc. for the F2P crowd.
I think one of the most important things to realize is that this community will always be here to help each other. I'm constantly spending lapis to open up slots for more of the newer people joining us. All we ask is that you keep Gaf in your friend message so we don't delete you. We'll always find a way to get through what ever Gumi decides to throw at us!