Can someone (riot?) Provide context in Ornn's pbe nerfs?

I see all these threads complaining about how riot never responds to the hard to answer questions, and just answers the easy stuff. Then all the riot responses that they don't want to get into a thread where the person is clearly emotional.

So, no emotions - just facts. Ornn has a 48% win rate - below 50% (noticeably). Ornn has around a 20% ban rate (last i checked a couple days ago) (quite high, like 7th?) Implies? That ornn isn't OP (or even strong), but people don't like playing against him. Likely because he's really annoying to Lane against?

So why is ornn getting an ultimate nerf that is only 10 sec at rank 1 (very minor) when he's in Lane, but 30 sec (42%) at rank 3 when he's already fallen off big time (you can't have it both ways, if he's too strong in Lane to make people dislike him, but has a sub-50 win rate, he must not be strong late)? Why is ornn getting unstoppable removed from his w?

What makes these nerfs necessary? These specific targeted nerfs (as opposed to other ornn nerfs like increasing mana costs or reducing his w shield or base health)? Is ornn considered an unhealthy champion? (Why else would you nerf someone with an under 50% win rate?) How will these nerfs make him healthy and create room for compensatory buffs to get him back towards 50%?

Given what I'm seeing, it would make a lot more sense to nerf Ornn's early game through either reducing his early damage, or increasing mana costs/cooldowns so that he's less oppressive to Lane against, then putting in compensation buffs after a patch or two to give him a stronger teamfight presence or otherwise improve his mid/late to help him get closer to a 50% win rate while his weaker early makes people not dislike him as much. Fix the problem, then balance him. These nerfs seem like they'll leave people still hating to Lane against him, he'll still get hate and be banned, but his win rate will drop even further. So even less balanced, but still a problem.