If garen ever gets another rework, i think he should be reworked into something similar to kayn
a champion who can chose between different passives to modify his kit and support entirely different playstiles.
the option of chosing between blue kayn or rhaast makes the difference between playing an assassin and playing a skirmisher dependent on what you, and your team need.
i think a similar concept could work for garen. not quite as extreme as switching classes, but having a juggernaut with pathes for different roles in different games.
this would allow to keep the champion mechanical simple at his core and easy to pick up by new players, but largely increase strategic complexity and add mastery to the champion by making the player chose the right build for the situation hes facing.
currently, garen already has a lot of different playstiles that his mains have created over time, and have item and masteries builds focus on different strategies how to play the champion in lane phase and around teamfights and objectives.
a couple of examples are:
- classic bruiser garen with resolve/sorcery or precision into builds with
into tons of health and defense - teamfight/secondary initiator garen with inspiration (glacial augment)/resolve with
to quickly follow up team engages of champions like
and litter the area with slow fields to synergize with allied aoe abilities - damage oriented split push/duellist garen with sorcery(phase rush) and items like
or
to fight and quickly dispose of squishier champions, and to wreck turrets - domination(predator, ingenius hunter)/sorcery(water walking) mid lane garen whos build is focused on roaming to bot and top during the lane phase
currently sadly a dead build with the lack of efficient itemization, crit garen used to be a thing aswell as a heavier carry oriented build
if you ever decide to replace the villain mechanic with something different, i think the player should be able to chose from an array of different passives that support these different playstiles.
for example, lets say garen doesnt have the crit scaling on his spin by default. but by hitting lvl 6 and chosing a specific passive, it would get added back to his e and his q, with the addition of gaining critical strike chance based on his cooldown reduction value (reversed old essence reaver passive maxed out at 40% cdr; up to 15%, 20%, 25% scaling with ult rank), effectively allowing him to build something like

similar passives could be added to support other playstiles and item builds.
- one supporting the classic bruiser garen and making him more of an all rounder (like adding 1% max health physical damage to his spin and auto attacks)
- one to focus on objectives and split pushing (increasing damage to objectives, maybe letting him ult dragon or baron for up to 1k damage)
- one to support him in teamfights, by giving him just a little bit team utility
etc.
and at lvl 6 hed have the option to pick one of those passives