An idea how to improve the Mordekaiser rework.

Add a second passive to him: "When Mordekaiser kills a large monster, he gains that monster's spirit as a controllable minion for [x amount of time]. The maximum number of large monsters Mordekaiser can control increases with his ultimate."

And for for Creeping Death: "The spirits under Mordekaiser's control can be imbued with Creeping Death."

While this doesn't alleviate the thematic problems of forcing Morde to require a teammate to function outside of the jungle, this at least doesn't shoehorn him into a role that doesn't fit him. A late game Mordekaiser with this passive would be roaming around the map with an army of Sentinels, Bramblebacks, Raptors, Golems, or Wolves, which fits very well of his theme of tearing the souls from his enemies and turning them into an army of his own devices, fitting for the champion designed after the Overlord archetype.