Granting CC immunity, preventing cloak, and being un-interruptable were good changes. Now here's the bad:

For one, it didn't need a damage buff. The damage was already crazy strong. My biggest gripe however is the fact that you cannot dodge it. If you're magicka, you can just spam shields, and continue with your day. If you're SnS you can just block it, and shrug it off. If You're medium armor however, you just die. This move needs to be dodge-able just like the bow Ultimate is. The fact that it can wreck just about every medium armor builds effortlessly is not balanced.