Master Yi and Olaf Balance
There are massive problems with these champs. No, I am not saying that they are "free-lo" or instawin, but honestly, they just lack outplay potential. They are both countered by CC, but that is situational, and both of their ults make them invulnerable to their only counter. This basically meaning an Olaf top against a lissandra is insta-win, and Master Yi jungle against a nautilus is just the same. These champs both have high burst damage, sustain, and CC/gap closer, depending on the champ. So basically, their only weakness is kited by long ranged people or just disengage with CC, both of which are made impossible by their ults. In a nutshell: Master Yi and Olaf are unoutplayable stupidly OP ban worthy champs that need nerfs. I am not saying these champs are not fun to play, as they are, but are just simply OP. I put a poll down below to ask what you guys in the community think.
Only immune to slows. Not knockup, not stun, not roots/snares/entangle. So no, against Naut he doesn't just negate all of that. Naut has a stun on AA and a targeted knockup slow, plus there is his Q. This much already shows you don't know how to counter the champion if you think an immune to slow = immune to hard cc.
Biggest weakness is attackspeed slows, grievous wounds, and kiting. Kiting only requires that you can space the gap.
all have moves that allow them to get distance between them and Olaf with ranged poke. Hell, you could use
and abuse counterstrike and jump to minions/wards.
Also statistically destroy Olaf.
or any hp item and you have a decent chance. Plus there is always
vs