It's strangely tone dear considering the stuff they tried to pull with the female mechanic (Cid?)
It's tone deaf to an extent, sure.
But for that to be strange? I don't know if I agree. This is obviously my perception talking, but I don't think a lot of designers, especially those rooted in fantasy or sci-fi stuff overthink sensibilities and whether or not their design is perfectly logical within the context of the broader world, and instead just stretch themselves a lot.
This is true for western designers as well. Bioware & the Mass Effect team are a good example. Miranda & Samara are far from exemplary designs and in Samara's case, she's worse than Dragoon Lady here in terms of cleavage.
And I don't think I need to say too much about Chinese or Korean character designers. Just have a look at any of their MMOs, and one can tell the design stretches for females.
Given the proliferation of such design in many, many games today and the past 10 years, what it means is that it's 'normal' and only recently has that "normalcy" in design being challenged. I think that there's still not a very strong movement in character and art design to be more conservative about stuff like that. It's gotten much much stronger in recent years, sure, but I think it's really only started to reflect itself in the past 1-2 years, and mainly in the western scene.
It'll be another 4-5 years, imo, for the Asian scene, given that the cultural nuance of such stuff isn't recieved negatively for their respective regions... yet.
For it to be reflected in FFXV takes a leadership that has a very firm stance against stuff like that from day-one, and is Tabata that leader? I don't think so.