So We've Come Full-Circle with Mordekaiser
The ability to cast W on minions has returned.
Now, be aware that this is my personal opinion.
But this tells me that once again, Riot has no idea what is wrong with Mordekaiser, since the entire reason they reduced the damage on his E and removed the W ability on minions and moved him to bot lane... was because they had no idea how to answer the toxic aspects of Mordekaiser's gameplay.
That is, the parts of Mordekaiser's kit that made him almost as unfun to play against in lane as a Yasuo, Riven, or Heimerdinger, namely being able to infinitely sustain and endure the most ridiculous poke and being unassailable sans a jungle gank while pushed far-out or facing at least three people trying to attack him under tower.
Edit: I'm not bashing Riot in my opinion, I don't think it's an issue of mere numbers that can be tweaked. My stance is simple in that to me, the rework gave Mordekaiser new tools and a better attempt to balance him with sustained damage versus the burst he had, but did not properly address the inherent issue of what made him so unhealthy that very little in terms of buffs could be given to him pre-rework, of which the burst itself was not the primary problem.