Yorick e and ult idea
I think most of his kit is good aside from his e(heals) and ult there other abilities stat may change
New e: spawn two ghoul instead of one one haunt the targeted enemy and one like a normal ghoul. when you attack a haunted enemy you heal. so now instead of a click and heal a lot you have to walk up and him them to maximize your heal
New ult: graveyard. Yorick put up an area (around the side of trundle e) enemies in this area get a debuff: suspense. enemies who have suspense take bonus affect from Yorick abilities
Bonus q: spawn a ravager ghoul with bonus atkspd and movement speed
Bonus w: spawn a giant ghoul(bonus health) and on arrival fear the enemies
Bonus e: the haunting ghoul now attack the enemy and not just attach to them (become a damage over time)