So, Skarner is basically my first champ in the role I actually main (jungle). I have played him for about two years now (though that doesn't make me a master or anything). Now, to be honest, the rework I thought was going to be simpler, I thought he was just going to get the pillar things and the rest of him was going to be basically untouched (maybe small changes to make up to the small buff the pillars are), and I was excited, I was actually thinking that it would make skarner more fun to play and "unique". The actual update seems really silly to me, as it is fixing things on him that were not really broken. However, the thing I hate THE MOST about this change is the MS lose on the 'q' he was literally the only champ that had that kind of passive (and was melee [ sivr ] ), and it was great, you could just build him to be super sticky, and (IMO) really fun, so removing that kinda ruins that champ for me. The change to his stun was kinda meh, it should help (sorta) in gank situations, but late game it is going to basically not be a thing. His 'w' change was kinda nice, but I don't really think it was needed, and I doubt it will make a big difference. His 'e' will continue to to what is does, namely, set up your ability to get to people, but without the 'q' speed I don't think it will be as useful. Any change to his ult doesn't really change anything for me, his ult is basically just a handy thing on the side if there is like a feed kat on the other team, and so any change to that is mostly irreverent.
Altogether though, I think something intelligent to do would be to keep the spires (they are a kinda cool idea anyways), probably make the stats they give you somewhat less. Then, (assuming you have live skarner) you reduce (potentially remove) the AS part of the 'q' (as the MS is the real deal). Probably reduce the base on the 'w' and give it a (smaller than what is was in PBE) max health scale. Then maybe give the 'e' a little more sizzle to it. Altogether, I think this would make him more special (that is what riot is going for right?), but still keep him with the same (and actually pretty unique) play style he has*. Honestly, I think he is a fine champ as he is (though, I am probably the odd man out there), but he is special in his own way already, just no one plays him because they nerfed him down into a state where you have to really know what to do and build to be good (right after IWDominate played him in LCS). However, if they really want to add spires in the make him 'unique' (even though he already was [IMO, but if someone has another champ that does everything that he does but better please tell me in case this rework goes through as is] ).
Anyways, cheers guys, thanks for reading my opinion.
*He is one of the few champions that is a great user of furor boots (try it sometime [with phage] ) <---- this makes him both super fun and super unique, and he has a cool ult drag catch ability.