So it is just social propaganda? But you have a point that he may step down as a CEO but still, he is the main owner and influencer on it so it is just the management is new. I think he steps down because he is too busy to manage twit since he has Tesla and SpaceX that needs his brains and effort. I've also heard that he is still in control of the servers and storage. So still he can access that data on it and maybe the CEO is kind of a puppet on him
Controlling of other businesses like Tesla or SpaceX is not the reason that musk can't control Twitter but he is building the hype that Twitter can't grow with. Twitter is a social media company that is sharing opinion and the opinion of people matter in the business. If he can't wait to hear other people advise he may not succeed with Twitter. He need to hear the voice of old staff and not to sack.