@RIOT May I submit that Skarner is a skirmisher?
His kit is ideal for dueling and 1v1 fights:
Passive: Ignore this, you tacked this thing on with the juggernaut rework and I still think its forced and no bueno.
Q: Crystal Slash- What we have here is a spammable damage ability, that ramps up after the first use as long as it hits a target. Its cooldown is reduced by auto attacks. Skarner, then, scales his damage very nicely with attack speed and Sheen procs.
W: Crystal Exoskeleton: We have a fairly low cooldown (with 45% cdr its like 6.5 seconds or something like that) Shield that works as Skarner's "sudo-sustain" absorbing and avoiding a lot of damage over a long fight. It is also a ramp up speed boost conditioned on the shield holding, giving him the ability to chase down fleeing targets, especially if used in conjunction with his slow. If you engage or get engaged on, chances are you are in for the long haul, whether you like it or not.
E: His currently overloaded most powerful skill. Although the beam damage has been obscenely nerfed along with its ratio, here is a skill that is an AoE slow, (which basically just means hey, you can hit your primary target through minions) with a single target 1 second stun attached to it, in addition to bonus damage on proc, and 1 second of increased MS, AS, and mana regen. It also reduces its cooldown for each stun proc'd.
R: Crystal Sting: His defining ultimate. A single target suppression/displacement. Easily countered by anti-cc items, but he has a decent cc chain to make that less of an issue.
I feel like the biggest confusion is that everyone sees Skarner, his ult, and says, "DRAG THE CARRY INTO THE TEAM!" So now we are currently thinking Diver. Here is my problem though: Skarner has no way to pass the front lines to get to the back line.
Divers, last I checked, are not defined by their ability to flank. Skarner is certainly good at punishing bad positioning, but in my experience, that is rarely a carry.
Skarner has good chase, single target cc, and a steady amount of dps once he gets some items. He didn't even get tankier base stats when he went juggernaut. If Im not mistaken he actually lost some base health and/or hp growth. They DID change his shield to scale with HP, but that is the only survivability improvement he got.
Single target cc chain: slow, suppression, displacement, stun, slow, stun. His kit is designed for dueling and killing individual targets.
Think of Skarner's original champion spotlight and design thoughts: He was going to capture someone and make them disappear... He was a vicious predator who chased you down, that once he caught you, you were not going to escape from.
Prior to the term "skirmisher" I used to always use the word "duelist", I, and I am sure many other Skarner players, have always loved the way Skarner can 1v1 a lot of champs.
Please consider this when you eventually update him again... DONT FORGET ABOUT US! :)
"I miss my kind..."