@RiotRepertoir, I have an idea for Garen's Passive...
First of all, i want to say that you made a great job on Garen's update, i really like these changes, especially ultimate :)
So, the thing is that Garen's current passive doesn't fit his character. It's called "Perseverance" and even reflected on one of his quotes - "I will fight as long as I stand!". But currently, once he gets low on health he escapes from the battlefield like a coward and safely regenerates his HP away from danger. After all, it's just Warmog's Armor passive mechanic... In my understanding, Garen is a man who will fight till the last breath. He will never run away from the battlefield, never cease to fight, never give up. The only thing that could stop him - is death. Therefore, i think that we can change it into something like: "Garen regenerates 1 / 2 / 3% of MISSING health every second". (monsters/minions restricts still apply).
I hope you will reply to my post :)
P.S. I apologize for my bad English, not a native speaker :(