Most of those things are kind of a matter of taste though aren’t they? If you change those kinds of things you’ll get other people complaining who like it as it is now. For example for me I think the default UI is excellent and the alternative ones I’ve tried are mostly terrible, but I know not everyone thinks the same way.

Other complaints are instance-specific but that’s a good thing; instances can operate how they like because we have a choice, that’s the whole benefit to Lemmy and federation.