...for playable Warriors Three.
With the current 3 power trees system, I thought it would be fun to give each tree to one of the Warriors; Fandral, Hogun & Volstagg. With the specializations, depending on which of the 3 you chose you would play as that character. This would make each character you play be fairly straight forward with (possibly) limited build options, except that you could effectively have 3 builds: one for each of the heroes. Some skills or powers would obviously overlap, like passives and movement powers.
In reality, I think it'd be a lot of work and probably not as high a return as they could get for other heroes, but I thought it would be unique enough to explore anyway.
That said, I'm so damned pumped for this overhaul!