How about a compromise? Each instance can define a blocklist of other instances they don't want, which is copied to the user's blocklist when they register to the instance. Then you give an option to the user to edit the blocklist.

This way you have the curated experience, but users have freedom to change it for themselves if they want to.

Tag yourself, I'm "Lemmy API exception not logged in"

Very good.

Also I checked fediseer.com, it's an almost perfect website, congrats.

For some reason I thought your thing was part of Fediseer, but now I see it just uses it.

Good luck with your UI fork, I'll keep an eye out on it to see how it turns out.