so basically you are saying: forget about backward compatibility and implement the best solution without any constraints?
IMHO this seems the best way of doing it but make sure everyone can "convert" ( yeah I know oversimplified ) their BTC from the old type to the new type.
But at this rate of developing and "screw deadlines" attitude and petty fights between Gavin and Luke ( and deepshit refusing to accept any change ) we can say bye bye to multisig for now

Yeah, even the old banking system and Benny printing his toilet paper is better than this chaos

Where is Satoshi when we need him ? Why has he not thought of this ?