LeBlanc revert, Mana changes, Azir probably having his wave clear reduced by a ton...
Mid is going to be extremely good of a pick in this kind of meta.
Why you may ask? Well, it's mostly due to the fact that Mordekaiser mid manages to out-shove almost any mage due to his insane amount of wave clear in form of an almost entirely AoE-loaded kit. He can instantly clear waves from level 1, even with little to no AP and forces mages to farm under tower, allowing him to steadily build up a farm lead over them.
Additionally the other class of champions that is going to become even more popular, comes in form of mid lane assassins, which make up some of Mordekaiser's best matchups.
The reworked leblanc was probably the only Assassin that could touch Morde and she was a really hard lane but the new one, oh boy, she's probably one of his easiest matchups nowadays and basically a free win if you know how to play the lane AND have a bot lane that responds to your missing pings.
Azir, one of the only THREE counters Mordekaiser has in mid, might have his wave clear neutered as well so Mordekaiser can stand a chance against him.
And lastly;
is getting it's AP buffed again, putting it at NINETY AP, which gives Mordekaiser an insane one item powerspike in form of the scepter.
All in all great set of changes to look forward to as a Mordekaiser player :^)