Is Riot still under the impression that Zilean's rework wasn't garbage?
To preface, I played a over 800 ranked games with Zilean between Season 2 and Season 4. I've gotten a chance to use his rework quite a bit, and I can honestly say its terrible. Nobody is using Zilean right now, at all. He's not even a little bit fun to play. The most fun thing about him, his E, got completely gutted. The potency on his E was barely increased because of the existent movement speed increase and decrease caps, yet its duration was cut by more than half. Zilean's rework seems like a Cass style rework in the sense that they threw some awful ideas together, and just said: "you're going to like this, and even if you don't you actually do".
Also, nobody likes his stun. His stun doesn't go along with his theme at all. Nobody likes his passive either, it offers nothing for gameplay and I honestly have no idea how it hasn't been changed. Nobody likes the changes to his E. This is because his E is actually less potent until level 14, which it then has massively reduced duration.
I can't think of a single reason why somebody would like this lazy rework, and I have no idea why Riot would think that anybody would either. Its terrible, poorly thought out (if even thought out at all), and leaves his theme as a time mage more muddled and fucked up than it previously was. Please put some more effort into champion reworks. If you don't care about a champion then leave them alone. Atrocities like this rework aren't excusable anymore and should never happen.