I think there are actually too many (dead) communities. I remember a while back the admins announced they'd do a purge, but it doesn't seem to have worked.
There's also the question of whether making the community here, with few users and lots of federation blocks, is better or worse than making it on lemmy.ml. A community about Leftist Aesthetics makes a lot of sense, but not so much for a community about Competitive StarCraft Brood War.