If TW are struggling to balance one system I don't want to see them attempt two at the same time
Honestly I think the best path forward is just to stick with the class system and make it work best they can. Even if that means just adding so many options to it that it might as well be Warband 2.0 anyway.
I wonder if each class has say 10 or 12 perks each (and lets say they were actually balanced) would people be able to accept the class system? Especially if some or most of those perks came with additional gold costs built in.