I like it. It's more intuitive because you could probably click on "271 Profiles" and see a list. You can't "see" a category. That's a descriptor, not a thing.
Discussion
What this UI does is use your categories to produce lists at runtime. The categories can also be used to do completely other things, but here it's just building lists.
KWIM? Like, if you go here, you see the list of my followers. You do not see the "category" followers.