I would prefer for the requirements to remain. Removing them might benefit min-maxers, but I think you'd have huge numbers of people who would assume that if your character can multi into a class, they will be able to use the abilities of that class (as opposed to seeing multi-classing as an opportunity to pick up a beneficial passive. It has seemed to me that in general Larian has chosen which subclasses to implement and made class adjustments with an eye to balance--rather than supporting super OP builds and allowing some classes to lag behind. In an environment in which modding is possible and there is a multi-player option, I consider this to be for the best.
