Would it be possible to modify the toot feed based on user recomendations? For example add an option to see "these kinds of toots less". I know that Meta does these kinds of things in a centralized manner - limiting controversial posts (info from Lex Fridman's podcast with Zucc).
Of course to do that on the level of "type of content" would require a personalized recommendation model, but perhaps an option to just limit the ammount of toots from a specific profile would be possible?
Another option would be limiting the toots from specific Mastodon instances.