I'm fine with that, although I don't see either Benett or Laura representing Love, it could be Serra's love for her child or we could get to know about the sisters in what's left of the story.
Is Anna a "hero" in this story though? Even she's with the good guys, I think she's pretty neutral and would get along with Taka or Lumi, who are with the villains but are pretty nice. I don't think E4 was supposed to be a team in main pokémon games either. And Lin wouldn't be Reborn's Champion, because MC is, that's what DJ Arclight and Victoria said at the end of previous EP16.