you could say the same about configserver mailscanner package. not to mention that besides mailscanner all other configserver tools are "a must have" for a webserver. yet, i think the things should stay the way they are now. it's pretty much ok.
i use configserver's mailscanner package and i am happy for now. things were easy and painless. never tried assp so far. yet i think that the things should stay as they are, as both developers they are doing great jobs and keeping people happy. integrating with cpanel would raise more and more questions like: why isn't that updated and stuff.