Is Shaco over-powered?
I've had moderate success with him as a Jungler and it's my theory that he's considered God Tier ATM because the power of low-level ganks is higher than previous meta's due to Junglers leveling so slow to where their mid-to-late game isn't really relevant.
Also feel like mid-to-late game, AP Shaco Support is easier to play because even if you can't burst someone down, it's easier to pick people off and the AOE fear / damage is better for fighting around objectives.