Funny and strong Team Rocket is the best for me.They did really well against Team Plasma before DA starts.
I think Episode N and DA showed us Team Rocket can be serious and comedic at the same time.
I don't like too serious or stupid Team Rocket.I think they are balanced right now and I am fine with that.
I think they must stay in XY series too.Ash's pokemons can't get any development without Team Rocket.This anime can't be funny without Team Rocket.Old Team Rocket pokemons should rejoin in XY.
I just don't want to see Team Rocket losing to stupid CotD.There is no need to put Team Rocket in every episode.