I am hoping that for the expansion we see all classes become equal in the amount of roles they have and the ability to use each of those roles. I don't want to see any class left with any excuse, real or imagined, why they should do better at any role than any other class.
I am hopeful the warrior class will get one soul completely changed to be a full fledged ranged soul. I am also hopeful they will get a new full support soul (If not a full heal soul; yes I read the dev post).
I am hopeful the mage class will get some form of a new tank soul rather it be to actually transform into one of there pets, use magic to turn to stone for armor and hp, or some other magic based tanking. Deflections and absorptions with either of those sound fun.
I am hopeful the cleric class will get another tank soul.
I am hopeful the rogue class will get another tank soul.
Most of all I am hopeful that Trion balances the roles between the classes, then balances the souls of all the classes in their respective roles so that any soul from any class in their chosen role can do just as good as any other class or soul in that respective role. The way it should be.
I am hopeful that after the expansion when you set your class's souls to perform DPS, Heals, or tank... No other class can say they are naturally better at that than your chosen class.