Ban NSFW posts entirely. Require subreddits to pay to be private. Take over/shut down subs that don’t make enough ad revenue for their subscriber count. Corporate sponsored/run subreddits plus taking over popular subs to hand over to corporate sponsors. New premium currency to spend on enhanced up/down votes (10x effect normal votes, no limit to use on posts/comments). Newer Reddit to replace old and new Reddit. Updated app required to browse on mobile, requires notification permissions to run. Ban subreddit customization. Subs must allow image posts and use chat. Block linking to 3rd party image and video hosts.
Worst I’ve seen was “ruffies”, best was “lovle1”