I knew I was falling so behind - the Department of Statistics Malaysia apparently has an official dataset of administrative boundaries... maybe time to write something asking them if it's okay to use these precious data to improve OSM (their website says all published data in their repo is open source - licensing is holy moly legalese beast)
@AkuAnakTimur I would be surprised if they didn't permit this, every other country is working with OSM (although UK has its own Ordnance Survey, a lot of govt websites now use OSM maps)