no problem! faith will never be a truly good guy, imo. part of my issues with show is how she's never truly backslid and how okay yeah she screwed up with the potentials and she and buffy had a fight/misunderstanding in the comics but she's been too perfect -- someone keeps it together like that, for that long, they break, usually.
but i will stop tl;dring and try to assure you that i don't have any problem with people being rightfully jerky to her. faith screwed up so much and so badly, if she was truly in character she wouldn't be able to handle everyone just being cool with her, unless, (like angel) they'd done just as bad.
so yeah, if willow needs to let her judgy bff self rip? you've totally got the go on it. it'll be fun, i think! :D