I don't understand what niche Garen has with his rework
I'm not a big Garen player so I won't really comment on how fun the rework is, although I definitely have negative thoughts in that area too. However, I feel like the point of these bruiser reworks is to make it so that you have a unique reason to pick every bruiser. Darius for example is the perfect clean up crew for a wombo-combo AOE team, Skarner is... a bit odd but apparently is amazing for objective control and Morde, well... seems like an anti-carry of sorts I guess? Hitting 6 first will be crazy if he's as strong as Riot says he is.
But Garen I cannot figure out. In what world are you going to want him on your team? Because of the nature of his Villain thing the only team comps it'll reliably pick a high priority target in are protect the carry ones where either the enemy mid (or most likely, ADC) will have many of the kills funneled to them, leaving them consistently the villain. This sounds great because Garen will reliably get his bonus damage on them and insane true damage ult. Except protect the carry comps... peel for their carry. And Garen is the easiest guy in the game to peel. What does he do against a Jinx with a Janna support? What if they go full overkill with Lulu top? Jinx can get kill after kill and spend thirty minutes as the enemy's villain without him ever having a chance to get to her.
If the enemy team isn't protect the carry then essentially you would pick him against a team comp that's somewhat lacking in peel but... you're just hoping that one member in particular gets fed there, and it's one of the members you can deal with. In this meta where everyone is mobile I just don't see how you can rely on that, it's a complete roll of the dice.
Don't get me wrong, I realise Garen right now doesn't have the biggest niche either - he's essentially just a lane bully tank like Sion was, except scaling much worse. But at least you had the option of counter-picking him to people like Riven and as a generally decent pick for shutting down enemy top laners that need to snowball. He doesn't have that option anymore and given the variety of nerfs to his stickiness he's not getting to any back lines barring Tahm Kench support either. I just don't understand what he's supposed to be good at anymore.
Can anyone tell me of a team you would pick Garen into or against with his rework? Because I'm genuinely unable to think of any. Riot says his passive encourages his teammates to help him get to the villain but I honestly don't think there's enough ally help in the world to make that happen, even before you take into account the possibility of the villain being a poor target. If he's released as is I genuinely can't imagine ever seeing someone on my team pick him and not groaning.