Some ideas to modify Sion's new passive

Sion's new playstyle is pretty fun, though I'm still learning how to make good use of everything (so easy to miss with him, but that's justified). One thing I don't like, however, is how his passive is rather hit-or-miss, with more miss than hit.

It's very easy to get away from Sion while he's standing there, roaring like a dumbass before going all L4D Tank. And once he's in that state, he's still easy to stop with one quick CC, on top of being killable via damage.

To make it more favorable to Sion, but also make it dynamic enough that any upgrades aren't broken in his favor, I'd like to suggest the following:

• Reduce the time he spends entering his "Undead Frenzy" state.
• Add a CC-purge effect to Death Surge (ala Gangplank's Remove Scurvy).
• Refresh Death Surge's cooldown if Sion kills someone while Frenzied (does not count assists).

The CC-purge, in particular, would be really nice, as it would give you an incentive to withhold Death Surge for a second. Use it after someone tries to stun-and-run, and you leave them wetting themselves as you tear them limb from limb.

EDIT: Oh, and if you need some Sion music, here. Courtesy of Blizzard. https://www.youtube.com/watch?v=OLXcvbBZjqw