Yeah the tournaments can get stale, but i honestly think the best way to get around that would be innovation. i mean the tournaments should not get stale because you are playing standard, its just the teams and stuff. generally this would just mean you are playing too much pokemon or something because in our ideal world pokemon wont get stale. I guess maybe later we can try themed tournaments, but honestly until these are running smoothly with basically everyone liking how it works, I want it to stay standard. The problem is we have to make sure everyone who joins the tournament knows the rules of the specific metagame we are saying, which can lead to a whole lot of fuck ups
Also i think you are confused. Doubles metagames are extremely outlandish compared to singles where you have to use a lot of random moves that would never have been heard of in singles because of how doubles works. It is basically 100% a new metagame and is not something we should think of as a simple spin off lol. Monotype i agree its a spinoff, and honestly i can think of other ones later if i try, but thats for a later time