People don't like Yorick mainly because he HAS to hit someone with E to be reliable
By missing that ability, he has lost all meanings of life (teehee) & has lost the capability to trade damages at all, except having to panic-ly spam his Q on the enemy laner or W his opponent & runs to safety. After level 6, if he were to miss E again & the opponent took this chance to hit back, Yorick will most likely have to resort to spam out his ult to deal "some" damage before getting rekt.
What I would want to propose is to expand his ghoul usage on his other abilities as well aside E. But in order to do so, his ghoul directing skills has to be limited only when he's in a desperate situation. So here are a few changes imo:
Q - Last Rites/Awakening.
Current: Empowers next attack & heals. If below 50%, heal is doubled. Cast Q again while on cooldown to spawn Ghouls from graves.
Update: If below 50% HP, heal is doubled & Ghouls will instantly spawn from graves without having to re-cast, and will start prioritizing who Yorick last Q'ed (mark on target who was last Q'ed lasts for 4 seconds). Unlike his E, spawned ghouls do not gain bonus movement speed when moving towards their target.
W - Dark Procession
Current: Traps people inside. That's it.
Update: If below 50% HP, ghouls' attacks will slow enemy opponents who are inside his walls by 50% which decays over 1 second, and also marks them. After the wall is destroyed, marked targets who are still inside the wall will be slowed again by 40% which decays over 2 secs, but only if moving towards Yorick.
Marked targets who dashed/blinked/etc over the wall before it got destroyed will still be applied the same 40% decaying over 2 secs slow, but will not be repeated if the wall is destroyed behind them. Again, only works if moving towards Yorick.
With these changes, Yorick will seem more dependable to handle moreover for himself, should there be a case where he heavily falls back from losing lane pressure from enemy laners like Darius, Irelia & so forth. These changes does not increases his potential threat of being a split-pusher at all, as these changes were mostly aimed at him being low health & if an enemy champion is nearby.
Let me know what you guys think.