Everything that Jennifer said in that article implied that she wants off the show, but she might be willing to stay one more season if it is the last. Jennifer is done with this show. She wants to do other projects. She doesn’t like her storyline and the inconsistencies on the show. She wants to direct. She said she is glad she did Ouat because it got her into directing.
Also, if there really is going to be a big change, which that could just be all talk because contracts are up and the actors are trying to get more money, but if there is going to actually be a big change on the show then the only thing that would cause a big change is either Jennifer or Lana leaving the show. Lana doesn’t seem to want to leave and doesn’t do other projects really, so it stands to reason, that it is Jennifer who is the one who might leave.