I did watch Mercy, first time I saw kate in a comedic role, but the rest was kind of blah. Yep I agree, schilling plays pretty much the same character and maybe that's what annoyed me. Her and jason biggs characters are my least favorite but yes, the other ones make up for it.
Sorry to say that there's not much more of the women in season 5, the men (and women) just get more crazy... and angrier hehe.
I've also been catching up on Ntsf:sd:suv, have you seen that one? Too bad she seems to have an increasingly small part in it, guess she doesn't have time anymore with filming orange. She's absolutely hilarious as kove!