Came here since the Reddit 3rd party app fiasco. Initially I blocked a load of non English language communities which seemed to fill the All feed. Kept adding to my subscribed communities list then in my app (Voyager after Liftoff stopped being developed) blocked a load of keywords, essentially Trump/US politics related.

Now my Home (subscriptions) feed has some great content. I check out All from time to time to see if I can subscribe to more communities.

Niche communities are still lacking but hopefully that improves over time.