It occurred to me that her not being with Gamzee would actually count as a big change, so maybe the point was actually to reinforce what Karkat tries to tell her when he finds her on the roof right before they arrive in the new session (i.e. since she'd remember the mysterious writing on the wall that happened right after he finally spat out the <3), and then that leads her to do something other than stabbing Gamzee repeatedly and then getting used as bait in the moments leading up to and including GAME OVER.