Being able to set retention would make me feel better about tweeting.
You can do some of this with third party tools, but it'd be nice to have it built in. I stopped liking Tweets though because it's actually impossible to remove more than 3k old likes. I was eventually able to do so, but it required contacting their DPO office and having them reset the cache each time so I could remove them in batches (entire process of reaching out, getting a response, and iterating took 6weeks-ish).
Limiting quote-tweets would also help people since most of the abuse comes from quote-tweeting rather than replies (which you can already limit).
I'm not twitter famous so I mostly only experience the good aspects of twitter.
If you have a highly curated feed and make an effort to interact pleasantly with in-good-faith people it can be a really great place. It requires aggressive blocking and intentionally not following hostile people though.
Some better blocking tools would probably also be helpful (block everyone who liked this tweet, etc.)
I'd also love a YouTube Premium style twitter where I could pay $10/month for no ads.
It's cool they have the culture to ship something big like this and decide to pivot - I think that's a pretty good sign.