If Yi is not affected by AS slows (wither, FH etc), can Olaf's ult also make him immune

I know its currently as intended...and that olaf is in a good place right now, but I feel sad that one of the champs I am quite irritated with because of all his unneeded buffs (nasus) can kill a big part of olaf's kit (AS on W + cdr on E from autos). Was hoping to counter him this way.
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