I was never under the impression that Chris and Sheva were permanent partners.
I'd always approached the RE5 storyline assuming that Chris was simply carrying out a mission in Africa because that's where the baddies were, and Sheva just happened to be his guide in Africa.
PS, I love the fact that you only seem to like comments that directly state they want Sheva back or that she was wrongly hated. Not that there's anything wrong with those comments, but it seems to me you're not very openminded to other answers...
Sheva was not a bad character, but she wasn't an extremely memorable one either. As far as the whole Wesker thing goes, the only reason she beat Wesker rather than Jill is because she just happened to be with Chris instead of Jill. Rest assured that if the two swapped positions , Jill would do just fine defeating Wesker with Chris. And there will always be fans for new characters just as there will always be just as many people who they just don't do anything for. So far as I've seen, you generally cannot talk someone into liking a character that they've already decided, for reasons good or bad, that they don't like. Also, since a lot of the people on this thread seem to prefer Jill to Sheva, I'm thinking that trying to find ways for Sheva to outshine Jill is probably not the way to go about convincing said people that Sheva is worth keeping around. Just a thought.