Reviewing the new modular approach to 2nd ed Pathfinder, I believe classes are counter-intuitive to this approach.
Instead, I believe the player should be able to pick the features they want. That and I would use this to streamline the feats found in the game, make three main branches, spells, combat, skills, and then continue to separate them from there. Rather than this massive bloat of feats right out of the gate, which is only going to get worse with side books.
