They should create a configuration of levers of some sort of context: controversial (slide the up or down), newsworthy, celebrity, sports. Not tags per se, those get too varied. Some basic directional sliders that skirts a fine line between avoiding echo chamberism and allowing people to filter things that offend them.
This could control top posts, but theoretically also their replies.
It's the stupid replies that make Twitter annoying, not so much the top posts for me.
It's much harder for people complaining about toxicity if they can filter it out. Then it'll be harder for them to argue someone should be deplatformed. Because then they would be arguing that you and I should be barred from reading that person.