Snorlax - an older Pokemon who was great and is slowly becoming victim to power creep. I'd like his new ability to be "sleep walk" can give commands even when asleep.
I wish they would make Snorlax better too. He's my all time favourite. This ability maybe a bit much though. +100 to his base stats and the first Pokemon with a 100% healing move with no drawbacks while effectively being immune to status. Sounds the most broken ability ever.
All they really need is to give him Slack Off. I don't know why he doesn't get this. He pretty much defines the description of what should get Slack Off. Pretty sure he would come back to OU then. He'd be a Blissey that could actually attack.
The Assault Vest is an ok tool for him. The problem is though his HP stat is so large that there's no real effective Wish passers for him.