Yeah and their idea of adding something new was mega Pokemon and now what appears to be like fusion or something. imo theres two major things they could improve: how you interact with the world (making it feel less like everyone is there for you and making your journey more of its own story) and making Pokemon at least feel like pets rather than some combination of stuffed animal and trading card
Never will happen tho
They did the latter with Pokemonamie in X/Y. I think most people ignored it because it was basically a Pokemon pet simulator but it actually made your Pokemon crazy strong and changed the fight dialogue to reflect your bond with your Pokemon.
And I guess they could accomplish the former with Pokemon go if there's a story element.