I don’t think Satoshi’s identity would change Bitcoin itself. The system is already decentralized and far bigger than one person. Of course, markets might react in the short term, but Bitcoin’s fundamentals—scarcity, security, and adoption—remain the same. Personally, I’d be curious, but I wouldn’t sell. The myth of Satoshi is powerful, but Bitcoin is stronger than its creator.
If anything, Satoshi would be just in more danger than ever due to everyone poking at him for what he did overall, and sooner or later, there may of been something done regarding him as a figure that created something like BTC...If needed.
By staying anonymous, everybody feels better and more confident about BTC, Satoshi included, in my opinion.