I'd usually be the one to join in with the 'let us have this make sense in-game' crowd but I really want Giant females to look different from the males.
It's odd but I never noticed it until now.
Like when Bioware didn't bother making female turians, salarians, etc in the first two games (I haven't played the third so I don't know if they appear in that). At first I was thinking that it wasn't an especially big deal, though a bit immersion-breaking, until I asked myself "Would people have noticed if it were the reverse?"
It seems like 'maleness' is considered more normal, or something.
I've just woken up so I'm not entirely making sense.
Before anyone jumps me, I don't think the omition of female turians or Giants or Imperial guards is active sixism.