Tails? Butt-flap like ol’ timey prospectors.
Wings? Backless…like cocktail dresses.
As for claws? Basically teeny tiny little daggers designed for gripping deadly weapons abstracted to +damage in MA!
I like the fact that mutations aren’t as great as purpose built body modifications. I like that they can be inconvenient–or weird–or give you strange dreams as you descend into post humanity.
I love that NPC’s can be human supremacists.
Or that nature may one day embrace you.
I don’t think the solution is to re-humanize the mutant with crafts and such but rather to make the ‘mutant game’ more interesting. My two cents.