Just adding another possible kit idea that sprung to mind while I was sleeping, utilizing and expanding on some of the ideas in my previous kit suggestion.
Passive - Yorick's ghouls gain 35% of his AD and 35% of his health. Yorick takes 5% less damage for each ghoul or Revenant he controls.
Q - 10/9.5/9/8.5/8s CD, Charged skillshot that throws his shovel (and if fully charged his lantern attached to it) to a given location. It has a minimum range of 300 and a maximum of 525, charges up to 1 second which gives max range, area vision, and a little bit of damage 20 (+1/2/3/4/5% Max Health). Yorick may reactivate the ability to have a spectral ghoul escort his body and soul through the land of the dead to his shovel. His next auto attack deals increased damage (+1.0 AD if yielding shovel, +0.5 AD if yorick hasn't reactivated the ability to regain his shovel) and unleashes the spectral ghoul which just like the current one but provides the aura to all nearby friendlies. The shovel remains in it's starting place until the ability is reactivated or he's moved too far away (1000 range).
W - 15/14/13/12/11s CD, Summons a Decaying Ghoul at target location that slows nearby enemies dealing Magic Damage, slow aura on enemies. May be recast while the ghoul is up to pull enemies near the Decaying Ghoul towards it. (very minimal pull, just enough to give that half step of running space)
E - 14/13/12/11/10s CD, Yorick cleaves the area around him dealing AoE magic damage (+3/4/5/6/7% Max health), healing for 10/15/20/25/30% of the damage dealt, and summoning a Ravenous Ghoul that heals nearby allies equal to the damage it deals. (gains increased range if yielding his shovel) Yorick may reactive the ability to detonate the ghoul doing minor AOE magic damage (+.6/.7/.8/.9/1 Bonus AD) and healing himself and nearby allies for 20% of the damage dealt.
R - 110/100/90s CD, Summons a Revenant of the chosen Ally that lasts for 10 seconds and has 45/60/75% of the targets AD and procs any on hit effects they have. If YORICK dies during the time the Revenant is up HE takes control of it instead and gains the abilities the chosen ally, also increases the duration of the ghoul to a full 10 seconds from the time of Yorick's death. The Revenant provides Yorick's passive to all nearby allies.
This kit has all the makings of some fun with awesome wall jumping capability, counter play opportunities, a decent skill cap, 2 skill shots. So many nuances that are possible. If he attaches the lantern to his shovel he gains vision of the area, requires full charge, otherwise it could be a blind leap into a trap, yet it could be used to set up some awesome defensive plays, or ways to just poke and return to his shovel. The Ult both feels powerful and provides some use beyond the grave for Yorick, while also not putting the power of the "resurrection" in the hands of someone who might not know how to use it while also requiring the Yorick player to be skilled enough to use it as well. The new healing requires a bit of putting himself in the thick of it while scaling off his health encouraging build diversity and yet still being helpful to a more damage dealing build as well since it will still do some decent damage but can be mitigated by magic resist somewhat and less useful if not in a pack of enemies.
Ghouls retain the same basic stats they currently do (just their effects changed). The CDs are increased across the board to provide stronger counterplay opportunities in the laning phase and moments of weakness in teamfights later in the game. The aura bonuses allow him to be played in a greater variety of roles with a much more noticeable impact in teamfights and skirmish scenarios. The reason for the stronger damage on some of his kit is because the cooldowns other than his Ult are roughly 50% longer than they currently are, he will suffer from not being able to do well if he doesn't land some of his skills or plays badly. His utility with this kit his much higher and survivability to ganks is improved as his weaknesses to lane opponents should be higher.
Maybe Riot will give this one a thought.