I fear I see the fragmentation of the site. I saw how much it hurt Voat. Having five subfoxes for one topic means that neither of them will get enough activity and discussion. I suppose many people create one sub of their own and contribute only to it, and it hurts making of the community. Furthermore, when person who created five or ten subs quits the site, we have five or ten modless, orphaned subs on the site.
For example, we have so many music subfoxes. Why do we need /s/listentothis when we have /s/music as default? Was it just somebody wanting to be a mod? Did they already decide that /s/music is too mainstream with three or four posts a day?
We should limit the creation of the subs. I think that if user could create one sub per 10 levels, it would insure higher quality and dedication.
When it comes to the music subs, it helps to categorize them. Especially with our music sidebar here. If I don't like much beyond metal, I'm not going to enjoy /s/Music very much and won't go there or post there... but I will to /s/metal. Splitting genres is hugely important when it comes to music as each sub is basically a playlist.
Then you have stuff like /s/cats and /s/hypnopuss like @Fluf is talking about. If you post hypnopuss content to cats, it's going to be a shit show in cats before long. When content B doesn't fit into sub A, you shouldn't just not post content--you should create sub B. Unless you want to post everything to /s/whatever and say fuck it, then you have 4chan.