Olaf Rework idea!

I played around with this in my head for a bit, based off of another poster's idea. Basically, the idea is to make Olaf a Rage based champ but give him his own shtick, instead of going with the example set by Renekton or Gnar or Shyvana. He becomes a champion who can activate and deactivate his rage whenever he wants, and gets boosts on skills once he goes berzerker mode.

His skillset essentially remains the same with a few tweaks:

Passive: Same, auto attacks now generate X Rage

Q: Hitting a champion with the Ax generates Rage, picking up the Ax generates Rage. When Berzerker mode is turned on, the Ax slow is increased and deals a small AoE where it lands. Each Axe thrown during BR uses up X amount of Rage, pickin up axes refunds the Rage cost but does not increase his Rage.

W: Least thought out. Same, but when Berzerker rage is active, he deals damage to surrounding enemies as well? Like Malphite's W passive? AA's use X amount of Rage

E: This one's easy; Same but when Berzerker mode is active he gets a short jump like Jayce's Hammer form Q. Costs X Rage

R: When not activated, Berzerker Rage gives the defense bonuses. When active, he loses them but gains boosts to his abilities. Instead of CC immunity, maybe tone it down to like 70% tenacity that overlaps and doesn't multiplicatively stack with boots or Zephyr; he should be a juggernaut but with bonuses to abilities, maybe immunity is too much?

What does the community think? @Riot @Meddler @IronStylus (conceptual and art. Plus he's just a cool dude.)