I wouldn't say Twilight Vampires is trying their hardest.
But I do agree, that if everyone got their way, SoM would go through yet another age of way too many useless covens.
Now then, there are methods of "beginning" covens, not necessarily new ones, but beginning covens with new ideas. Leadership positions can be handed over, and it is not required that a coven keep their "theme" or focus. So new leaders can change the idea and focus of a coven at any given time.