Balance in Heroes 5.

I just recently started playing Heroes. I began learning the game by playing through the campaigns. With friends, I only play as factions that I've already somewhat learned in the campaigns. Right now, I'm playing through the third campaign. I don't want to play as Humans or Necropolis with my friends because after the 1.5 update comes out, I'll have to relearn everything. That leaves only Demons. And that's what I'm playing as. It's a shame that you can't choose heroes from the campaigns. I would play as Agrael. And for Humans, Isabel is the best support hero (IMHO).