If Jesse ever even thinks about wanting Rachel back, he needs to get down on his knees and beg her for forgiveness and make it up to her. But I think that she should still reject him and Finn, and choose Puck, because he treats her better than Finn & Jesse.
Though an interesting story arch, I don't think it's going to happen. Jessie clearly cares more about his music (to a higher extreme than rachel, if possible) than about girls, Finn is still hurt/ pissed at rachel, and Puck is just trying to straighten his shit up. But we can all dream, right?
so she'd have three guys fighting over her, and the rest of the club can just sit there in the background and not get any action, because everyone want's to be with Rachel, you see this is the only thing that i find annoying about her.