I think that using transfarable tokens for core decisions is exploitable. Something like soulbound tokens for crafting DDIPs would be a better idea. Maybe you could even burn those soulbound tokens for $CODE but not the other way arround. And you would earn this tokens for contributions and participation.
But while we can better control the creation of DDIPs, if the voting is done on Snapshot, we still are vulnerable to exploits. A bad actor with a big percentage of tokens could control proposals outcome.