I agree. I haven't posted much to my local subs these days.
The way to get your feed feeling more how you want is either to block communities you don't like, or subscribe only to communities you like.
The communities are patchwork and so the growth rate is not uniform, the TPBS group are recent Reddit refugees that migrated over all together which is why they are a bit of an outsize group on our small and humble server.
I agree that a default/local feature set would be great, I've been talking about community groups (multicommunities, tags, whatever) should be a thing for months, things that would make it a little easier for users and server admins to curate the experience, because I admit it the feed can feel a bit chaotic when not logged in.