If there's one thing I learned with Splinterlands is that a DAO doesn't work well for a game.
However, it would kill the game to move away from that. It would be a massive rug to the people who have invested in SPS.
One vote per person would require KYC for an account with spellbook and even with that it would be possible to register family and friends. Maybe it would require the account to be at least X time old and have Y modern ranked games played before a vote counts, to make it more difficult to create extra accounts to vote.