Are multiplayer characters will be always on highest level in the game (18 now, I think it will change later when devs will add more levels)? I know that now there is to little players for various levels in mp, but is it possible that in future there will be some kind of leveling (with fair balance between opponents) or maybe different leagues?
I'd love to see them have set level tiers that everyone playing in that tier is set to. For example there would be a "Level 5" tier where no one has any power tokens, a "Level 18" tier where you get the 4 clear and 4 bronze tokens, etc. This would let you pick the power level you want to play at and would provide some serious challenge (read: opportunity) for deck construction. I think doing this would help low level gear remain useful in MP. Balance might be a issue with lower tiers being dominated by players with the legendary items, but I'm not sure that it would be any worse than the current situation (which isn't bad at all).
Agreed that it wouldn' be worse. For example I played whole SP campain (almost twice) except paid adventures, made a lot of quests (most with no party deaths and some others), played about 100 games in mp and still haven't any fireballs or volcanos and i have only one item with 2 firestorms.