It's also a different theme from CoC, where you lose your humanity etc etc. Here, you can walk into a saloon and come out a hideous squid thing if you so desire. (At least in universe, I think as far as saloons go we top out at furries or elves) It's all inherently cosmetic, including in universe. I think TiTS has its share of inherent design flaws, but going back on the choice of "cosmetic only" would be one of them, imo.
Now. As for the topic proper, beyond the more sweeping content of "A world that isn't a borderline apocalyptic shithole" I'd like to see more human characters. Shocking, innit? People that prove themselves with personality and potential fetishisms over just their appearance alone. Also; hoodies. Hoodies are cute.