I dont mind the whole villian concept, but, it really only just double-downed on his pre-juggernaut style. He just spins and kills things faster later in the game.
What I believe Garen needs is a New Passive (Not a buff or nerf to his current passive). Right now, his passive and his abilities (Q, W, E, R) do not really have good synergy with each other. His abilities feel like they are designed to go into a fight, where as his passive rewards me for staying out of a fight. The passive is called “Perseverance”, so this should mean that he will stay alive longer than anyone else, WHILE IN THE MIDDLE of the battle. This passive alone should be enough encompass what Garen is at his core, the sturdiest soldier on all of Demacia. Garen should have his passive activate when he attacks (similar rework style like Ryze's passive).