What’s wrong with the 70’s World Championship system (first to 6 wins, no game cap)? That means no draws/tiebreaks, and each player has to play at least a little enterprisingly to move the match along. None of this 12 draws, blitz (there’s already a world championship for that!) nonsense. FIDE dropped the format after the ‘84 match, but the way they handled that was sketchy anyway.