My 2 biggest changes:
1. I like their concept of the "Lay & Pray" but I'm against all standups, period. If you can't get up, that's your own problem.
2. Knees to a downed opponent. Hear me out, I'm fine with no knees to the head if the opponent is actually down, but putting your hand on the ground to avoid knees to the head is BS. If it's an elbow, hip, knee, etc., then it's fine, but the hand/fist/knuckles, no way!