Hopefully all the different clients will soon support good blocking. With connect for android I can block instances and keywords, but I most just continually block on a community basis what I don't want to see from All. I'm sure there are hundreds in there. This keeps it quite relevant for me but I'm still in the flow of seeing new subs. I do subscribe to all the ones I really like.

So it's a curation process, but a more active one vs trying to hunt subs down like I used to do with Reddit.