See, I didn't even notice that, but I'm not that far in yet. I usually pick up on things like that, as I'm pretty picky. After Awakening scarred me, I just make sure the characters actually have feet, & I'm satisfied for a bit before I start my internal criticism.
I agree about the outfit of female Byleth, tho. I noticed that any who chose to say one way or another in this thread picked male Byleth besides us. Is that the most common choice? Is their a reason, if so? I always pick female characters when I have a choice, as I prefer looking at a female for all the hours I'm forced to stare at the protagonist. Some games in the past, like Mass Effect, I chose what I wished or saw myself looking like in that world, so it was Male (as was the transferred version I'm ME2 & 3). I think those were the last games I tried to make the main character look like myself, as I then changed to the rationale I mentioned above for some reason.