I don't mind Ornn but his release speaks volumes on Riots policy regarding crowd control

They don't care that it's been power creeped to levels beyond out of control. Crowd control is honestly the most anti-fun element of gameplay League has to offer. I'm not suggesting it be removed because you can't remove crowd control, it's completely necessary and makes the game interesting. But being chain crowd controlled is obnoxious and often times, even with mercs, you'll feel like there was little you could've done to avoid it.

While damage does have a similar outcome, at the very least damage can be interrupted and the champions who dish out damage are extremely vulnerable to dying and typically isolated to 2, 3 champions at most (when support itemization isn't protecting them from dying while standing in the sun). Crowd control is legitimately found in every kit, class and it's existence varies in slows to harder CC spells to ones that outright ignore tenacity all together. And as Rubick has pointed out, there's little variance in the skill of landing crowd control because regardless of the range it's applied it, its severity is still the same, making its existence incredibly punishing to melee champions. When dodging damage spells, you typically interrupt massive chain combos and will notice huge reduction in damage (like dodging Zed Qs during his ult mark).

Honestly there's no going back. You can buff the ever loving shit out of tenacity and the only thing it'd accomplish is breaking it on ranged champions while melee bin tanks would still be dumpstered. I truly believe all fighters need another rework with the goal in mind to have their kits self mitigate the affects of crowd control significantly or outright ignore it. They currently cannot survive affects and unless you're Renekton, Jarvan or Rumble (who is basically ranged, let's be honest), there's no place for you in this game. I don't foresee a scenario where fighters not named Fiora can have a competitive chance at dealing with the abundance of CC in this game and it seems the only way any other fighter can is to be overpowered as shit like Ren (who falls off), Jarvan (can be unreliable) or Rumble (relies on ults regardless of how strong/weak he is).