@Riot, does Zilean's increased popularity in high level play (especially worlds)...
...increase his kit rework priority?
I can't think of anyone who really enjoys playing Zilean, or feels satisfied playing him, let alone playing against him. He just has so much unavoidable free damage with his bombs, and his ult is incredibly powerful, and on such a short cooldown (it says 180 seconds, but his W pretty much makes that a blatant lie that, again, is unavoidable and has no counterplay), he's pretty high on the ban list so far at worlds if im not mistaken, and this OMG vs Fnatic game going on right now is proving why. He's just a plain unfun champion all around (strong opinion, but not one without support).
If I remember correctly, Poppy or Warwick are next up after Sion here is relaunched, but I think Zilean should honestly be considered to move up a bit on that list. I would be very, very surprised if his Worlds performance so far has NOT caught your attention, and maybe made you rethink how high on the kit rework priority list he is.

+
= dead.