Suggestion: double the effect of yorick's passive for 10 seconds if he succeeds in reviving ally
so normally he can get 20% AA dmg and dmg reduc. with all 4 ghosts, but when an ally revives temporarily, he loses the 5% from the ult ghost. So i think that if an ally gets revived, it doubles the 15% AA dmg/dmg reduc from your (potentially) 3 ghosts to a max of 30% AA dmg and dmg reduction. not too powerful keep in mind there's better like urgot getting 50% and braum getting 40% damage reduction, and people like riven basically have infinite 50% AA dmg.
So basically:
if yorick revives someone with his ult, make each ghost worth 10% instead of %5 for the 10 second life of the rez'd ally
maybe yorick will see more play, i dont see why people dont like going against him, he is fun to play and play against because he gives you free gold lol