Daily reminder the keystones were designed solely for Yasuo
Just think about it. Discounting the hyper generic keystones that most people could use (which yasuo can also use) like dft/tld/stormraiders, Yasuo can use fervor (it was actually reworked to muscle out on hit champs in favor of those who can crit), warlords (remember this keystone was originally designed for him and Tryn alone), grasp (this was a popular choice for a while when tankcancer yasuo was more of a thing), CoC (hahahahaha this is getting frustrating) and windspeakers blessing (he can't actually use this but that's only cause the intern in charge of this keystone forgot yasuo gets a permanent refreshing shield every 2 seconds, or maybe he can who knows).
95% of the champ pool have effectively 1 keystone. Sure you can pick CoC on Yorick but really that would be retarded. The other 5% though do have a choice and hilariously (not really) enough they're some of the most hated champs to ever exist in league with particular kits.

Does Riot seriously not see the problem here?