I know this may seems a bit harsh......but here we go.
I love the number of classes and combinations in game, I really think there should be limits though. Like.....5 adventure classes per toon. Until now toons could be anything. Why even have classes at that point? Crafting is a bit different in this reguard as many people could be a jack of all trades, but your adventure class should be more refined.
Group level limits. I think you should group with anyone you please, but if you're in a group and you're the lowest toon and the highest level toon is 11 level higher then you then you get NO experience. Conversely, first to damage the mob get's the experience for the mob. You'd better do more then 50% of the damage to kill it though or no experience for you or the other person.
That's my two copper....flame on, won't change my opinion any, but flame on.
L