The thing with Laura can also be interpreted in two other ways:
1. Ame knows about how they're being chased and stuff and she wants to give her some time off
2. Bennett's inclusion is the first step of a Team Meteor plan consisting in slowly infiltrating the league. Today, they put in there an apparently normal young promise. Tomorrow, Sirius and Solaris or Taka are going to be there without anyoune noticing the moment when they got there.
But this theory might only be valid if we assume that El has been in the league for some time (before joining the Meteors).
Despite this, I'm almost sure that we won't fight the same E4 in the main history and in the postgame.
I think I've read that even though they're with Connal because of their orphan status, he still claims that they've got some "loose screws". IIRC, he has diagnosed Anna with Schizophrenia, Noel with Asperger's, Charlotte with ASPD and Laura with OCD.
From what I've seen, she was just the Dragon leader.