I play a Warrior.
I'd like to see a return to stance-dancing to influence our gameplay, and to utilize different weapons for different playstyles even in the middle of combat. Wrath was the prime of Warrior PvP, emphasizing a need for a warrior to burst down with a two-handed weapon, and then play defensively with a sword and shield, pop Shield Block, and use revenge. Warriors felt so dynamic, then.
I'd like to see that Warriors would not be so susceptible to burst from classes like shamans, retribution paladins, hunters or rogues (in about that order). It feels like our survivability is really in the crapper.