Alternative Diversity System
Fist of all, thank you for the changes made to the AW scoring system.
I suppose what upset people about Diversity in general is it didn't make the defenders stronger. It was purely points based.
So what if Diversity actually made the champs stronger?
idea 1:
Diversity for Attackers
"For each unique attacker in this battlegroup, each attacker gains +1% attack and health"
Thus if there were 30 unique attackers, each would gain a +30% bonus to attack and health.
idea 2:
Faction-based Attack groups
example:
"for every unique Avenger in this battlegroup, each Avenger gains +1% attack and health"
(though the problem i foresee in this system is not all factions have the same roster size; for instance, the Avengers and X-Men have a lot of characters to choose from, while other factions like maybe the Defenders or Fantastic Four aren't so numerous)
idea 3:
Alignment-based attack groups
"for each villain in this battlegroup, each villain gains +1% attack and health"
similarly:
"for each hero in this battlegroup, each hero gains +1% attack and health"
Of course, these systems are entirely optional and have no bearing on points, thus players won't feel "forced" to adopt a diverse lineup.