As others have said, Uncommons are just Rares with no dice.
Two full booster boxes left me okay for the hero side but terrible for the villain side. Too many of my rares and legendary's are equipment rather than characters. I have no Rogue villains. After more than $200 I think I should be able to field more than 1 or 2 barely passable villain decks or have a stack of yellow villain cards that I can't really use. I think there needs to be a higher percentage of legendary/rare characters to equipment over what it currently is.
I agree with not buying loose packs but that's a turn off to many gamers; not everyone can pluck down hundreds of dollars for boxes. I work at a gaming store and it's hard for me to push individual booster sales when I know that they have very little value.
I think it should be more characters in general, and a lot more cards should be neutral with only specific cards (jedi council, sith holocron) tied to "hero" and "villain",
Even buying a box is no solution if you want a blue yellow villain discard deck, and all you get is red villains, yellow upgrades and blue heroes.