The gameplay of sun and moon was generally improved but as everyone know the story is too linear and simple, and things only started after you become champion which shift completely into gameplay. It feels like the full content is still in development for the switch where we can explore the four islands however we like as opposed to Alia's baby-sitting in mmx5. And the performance drop, well, it's clear the assets are intended for the switch. We could even get something similar to bw2.