And add to IVAN a new disease, haemophilia, which means that whenever you are wounded you die of blood loss after some time (unless healed), and it is a genetic disease, thus it can be gained by starting with it or by polymorph gone wrong.
Not to turn this into an idea topic... but I think it'd be cool if there were side-effects to polymorphing into powerful creatures like that if you didn't have enough intelligence...
Starting with random features = bad idea. I dislike the random stats enough
(IVAN is pretty non-random in a lot of aspects as compared to the rest of roguelikes, which I love)