Considering they're upping the health again I say 66H+K needs to return. I don't even care if they take 46H+K away (make it a launcher tho) as long as 66H+K returns with NO wall hit. Yes, that does sound quite nice.
If they reduce the amount of stuns tremendously then I'm fine with them going back to the original threshold. As is its way to easy to get a deep stun and it would all be one huge mess