Personally that sounds worse than the current version of rot. If I get affected by your version, there's not really anything I can do about it, and it renders me completely helpless towards the end. Basically I have to go hide somewhere and wait for it to end.

With current rot I can carry +CON items and change into them, then go about my business. Only thing I really have to worry about is being cursed, blind and rotted, since then I might have trouble removing blindness so I can wear my CON suit.