But they didn't change Shiva at all, my guess is this isn't censorship but some of the original design work looked a bit weird when upscaled so they took a bit of artistic licence, it's not really clear what the original designers intention was for that crouch area, but the feathers probably look better than a high-res merkin.
Rhinoa's top also looks fine, her boobs would have been around her waist if you take the original texture work seriously. Plus she's classy, not like that trailer trash Tifa.
Don't get me wrong, if they put clothes on Shiva my jimmies would be rustled, but these changes honestly feel like they are just part of the HD treatment rather than an agenda.