03-12-2016, 01:59 PM
Innovation and pleasing everyone isn't "simple and easy". Eventually a series has a plateau. Take your own example; Pokemon. The following generation added Abilities. They have to decide what abilities will do, decide what abilities make sense for a Pokemon to have, balance the abilities as best they can so a certain type does not become overpowered, among so many other things, and do that not only for every Pokemon that came before 3rd generation, but every Pokemon made for it and every subsequent generation beyond.