You can vote here.
ETA: And here is a fairly detailed post where LJ again try to explain why they won't give users an opt-out of the new page. They also detail three minor things they are considering changing in light of the feedback they have received over the last couple of weeks. They do again assure they are reading all comments, and continue to ask for it.
ETA 2: And here LJ explains about the post-move issues we have been experiencing.