Diversification of a metal man.
Hello, I like playing mordekaiser because I am a member of his dedicated player base and am a fan of trying him out in different roles. Primarily, I am, like most other mordekaiser mains, more of a solo player. Running off and farming everything in sight is part of the package that makes playing him fun.
Please consider allowing W to be self cast as well as cast on allies. This small change will remove the choke hold that is the support/adc meta, I would no longer be forced to convince 4 other people to abandon what they're used to and the restrictive play style of no longer being able to go top mid or jungle.
The health return on proc was a really good idea. Simply making it self cast as well would open the doors to a jungler with amazing clear speed, incredible dragon control and assuming you converge from behind the enemy, a strong lane ganker because of the movespeed buff when cast on ally, heck adding a conditional slow, like if the enemy is overlapping both yours and your allies w radius instead of the out of place xp gain passive would make him an incredible jungler and make roaming as a laner more appealing.
It's like you went 99% of the way into making a hybrid tank jungle, then decided to force him into playing bot lane without a marksman.
He doesn't really fit anywhere right now.