I am going to disagree and say that their diversity is their strength.
People talk about counters to clones, Rebels, droids, RG/Rey/QGJ meta, and now the Palpatine/Vader/RG combo. You hear about how this team can beat that team, but not this third team.
In my experience, Jedi can beat any team (on offense) because of their diversity. Facing droids? Easy, Jedi have high health and IGD lead will pound all the AOE droids into the ground with counters. Palpatine and Vader...Old Ben or Dooku, no problem just use Battle Meditation and they get neutered real quick. Need to get around RG, no problem, QGJ is your guy. Rebels? Oh, I love this one. Have Yoda steal Leia's buffs and spread them to everyone. 10k crits for everyone! Clones, you ask? Put them behind Barriss and it's like you get cat scratches, nothing more. Oh, and that occasional Ewok team? Well, let's see how they do with counters when they get all their bonus attacks.
My standard team for the arena, raids, (and most of GW) is:
IGD (L)
Aayla
Anakin
QGJ
Yoda
I love them and don't see a need for a single change or substitution (but, would consider for another stunner like the Rey or Luke Jedi characters in the game).
Although...I would be intrigued if Mace were reworked into an anti-Sith character...