Yeah, seriously.
I used to be into comics a lot and most of the people I know like them as well, and there are not too many who were happy about these two being in the game. Actually no one was happy.
Why? She-Hulk is a walking joke-character; as also portrayed in Marvel 3 - just like Hercules.
And X-23? That has to be the most terrible character in comic book history. Her origin is so incredibly distasteful and stupid that I don't even want to think about that character.
But the main problem is always ... they may play and feel different than their male counterparts, but in the end of the day they're still wasted slots for characters who are far more unique and could offer you much more, like for example Anti-Venom. One could argue that he is exactly the same as Spider-Man, but thanks to the symbiote Venom opens an entirely new world of powers and in game fun.
If I can have that, I could care less about characters like Batgirl and Power Girl, since they simply don't bring anything new to the roster besides more boobs.
Don't get me wrong, I like boobs... No, I love boobs. But if I have the choice, I would still take the boobs that offer me more like Ivy's, or Circes, or ... you get the point, aight