Regarding 1: Sure the game itself is centralized, for example Axie Infinity might even ban players who "cheat" according to their definition of cheating. So if you are a bad apple or get banned without justification, then block chain won't help you.

If however (some years down the line) the original game creator abandons the game, any group of people could jump in and revive the game (by re-creating or updating it or doing something completely novel) based on the state that is still available on the block chain.