Garen's update seems cool, but he got too much unnecessary nerfs.
Base stats
HP per level reduced to 84.25 from 96.
What the actual fuck? You do realize it fucking means a 200 HP loss at lvl 18?
He can even trade correctly early game anymore, since anyone like Riven or Renekton can just shred him even before he gets to deal damage to them... Riot basically killed his laning with this one change.
Perseverance
HP regen at level 16 reduced to 1.6% of his maximum health from 2%.
... Really?
His passive is already completely useless during a teamfight. This change hurts his splitpushing more than anything to be honest. This change feels very unnecessary and is just killing his late game even more. Now, we got an early game nerf and a late game nerf, what now?
Decisive Strike
Silence duration reduced to 1.5 seconds at all ranks from 1.5/1.75/2/2.25/2.5 seconds.
... Really? The core part of his kit has been nerfed into oblivion despite you guys reassuring us about how you won't nerf Garen's silence. He already fucking needs to get in melee range to use it and since he already lost the Tenacity on his W AND he now gets the self-slow on his E when he attacks CHAMPIONS, he'll be impossible to play in teamfights, as he won't ever be able to stick to anyone.
Courage
Bonus Armor and Magic Resist passive removed.
Now permanently gets 0.2 Armor and Magic Resist when striking down an unit, increasing to 1 to champions, large and epic monsters.
Tenacity removed.
REALLY????? THIS IS BASICALLY DELETING THE ABILITY!!!!!
This is fucking bullshit. He loses a lot of late game tankiness, which was one of his core strengths, in exchange for this minimal and bullshit Armor and Magic Resist steroid. Plus, he even loses the Tenacity boost, basically making him even more kiteable than before. Plus, Courage already used to work like this, until you reworked it into the current passive, which is 100 times better. Now, you're basically removing Garen from the game.
Judgement
Now Garen gets slowed by 20% when striking champions with Judgement instead of minions.
... Silence nerf, Tenacity nerf and now, he gets slowed when striking enemy champions with his E. Well done Riot, now, Garen can't reach anything, because everyone in the game now counter Garen. This is just plain stupid from you Riot.
TL;DR The current changes are trash and they're basically a free ticket to the dumpster to Garen. Don't fucking go through with these changes OR GIVE HIM EXTREMLY HIGH COMPENSATION FOR IT.