For one thing, Musk is proposing a premium Twitter plan where users can pay $3 a month for extra features. This is probably something that should have happened from the beginning, but I think that Big Tech doesn't want any of their social media sites to have a subscription service. If they do, then they end up having to play by very different rules.
You see, all this censorship, all this shadowbanning, actual banning, rate limiting, etc. are only permissable because sites like Twitter and Facebook are free to use. So long as you are not paying for using their products, they are pretty much allowed to dictate the terms of use. But when you're paying them to use the platform, suddenly you get to have some leverage. It is no longer a privilege, it is a contractual transaction.
This is why there are a lot of people who are angry over this proposal. Because it would basically mean that Twitter has to eliminate a lot of their thought policing and instead become a platform again.
Another idea I've heard him propose is an edit button, which nearly every other social media platform has. This is a feature Twitter should have had from the beginning and if they were worried about people deceptively changing tweets, they could easily implement a post history option so that users could view the original tweet. It's not a hard thing to do and I know that Twitter keeps a record of all tweets, even the ones that get deleted.
Musk has also proposed an encryption scheme for Direct Messaging on Twitter. This is probably one of the most needed features on that platform for the sake of privacy. DMs can be hacked and intercepted in transit. The whole point of Twitter DM is so that people can have a private conversation. But you may as well send a SMS message with bomb blueprints.
On top of that, what's to stop Twitter employees from viewing your private DMs and broadcasting them to Antifa or Indian terrorists? If the messages are encrypted so that only you and the recipient can view them, then they are about as private as you can get.
Look, I'm not about to join Twitter. Even if Musk's deal goes through, I'm going to wait at least a year before I even consider signing up again. But the fact is, the bar is so low at Twitter right now, that getting taken over by that billionaire hippy is only going to be a net positive overall for the company and the Twits who Tweet.