Not sure how I like the new Skarner rework. Initially I was excited for the passive change, but now that his full rework list is on the PBE I'm feeling a bit more antsy.
He looks a bit less viable in the current Devourer meta, as his passive on-hits have been taken away in favor of buffing how Q works, and his early-game jungle took a sideways nerf since he cools down q slower on the non-buff camps, but he can do the buff camps absurdly easily now if he has zone control (and it gives him vision to, to protect from buff-stealing).
His base stats and his w are now heavily nerfed out of Damage Skarner's favor, as the w is max health based, and his base stats took a mostly heavy nerf.
On the other hand his late-game with Devourer is even more ridiculous now that he has his passive and his q has lower cd at later levels, but merely getting Lategame Devourer Skarner requires intense farming and hoping your teammates don't all get destroyed in their lanes, because having to help lanes reduces your farming time unless you can get lane kills, and early game skarner ganks are really terrible.
This is all balanced by the fact that they made Skarner scale really well with a Bruiser playstyle, but since the tank meta is going down the drain really fast, I dunno how much that actually helps his play on the whole, when he still has to compete with champs like Yi and Shyvana who just destroy everything if they can get farmed/fed on Devourer.
Also not helping that Cinderhulk got ANOTHER sideways nerf, so even though I can have a decent midgame as Bruiser Skarner, he drops off more lategame if I try to stack health or something (and that new hydra item is pretty much a must on a Bruiser Skarner, which scales off... you guessed it, HP)
PostEDIT: I'm actually excited for the new Morde, I was planning on exploring him next, and with the rework coming he looks fun to play botlane and troll the ADCs.
IMAGINE: Zekes on Morde Botlane. The devastation will be fucking unreal.