We've also already seen Beehaw defederate from lemmy.world and sh.itjust.works due to the sheer volume of users creating issues around moderation
Troubling but understandable. Beehaw is basically fediverse tumblr, they need to prioritise their own safety.
It really highlights the other main issue though in that people really want a new alternative to work so are obsessed with growth at all costs. But maximising the influx of new users is going to have negative effects on quality, culture, and community.
A bit of friction to onboarding, and a slow steady growth that allows a community to form is what's going to set this up for success
Your client should have All and Local feeds, All being for everything your instance is federated with