Was it really necessary to change zac so much?
I mean the only spell that seemed kinda outdated was just his Q... I feel like that his Ultimate was unique, easy to use and had multiple ways to be used, it gave you the possibility to make plays if used properly during an engage.
New ult just just looks like a worse version of the old one... IN EVERYTHING. Damage is rubbish compared to the old one, it looks extremely clunky and the enemy has plenty of time to escape, you can't even heal yourself anymore from your blobs that you used to get from your ult... It feels A LOT more limiting than the old ult. I am all in all for changes when a kit it's outdated or impossible to balance (like maokai's old ult) but this is one of those cases where you made something which wasn't necessary for whatever reason (like you did with skarner a long time ago.).
Meanwhile rammus and malphite (you know TANKS which were supposed to belong in the tanks rework) are still waiting there for their kit rework/visual update since they are extremely binary and outdated as champions...