He is quite OP.
1. He can almost partner with almost every support champ and play decent games.
2. His early, mid and late game are all quite good.
3. His farming and pushing is strong with his Q.
4. His burst damage is high due to E+Q+R combo.
5. His great mobility from E made him hard to gank.
6. His W, if put on the right enemy champ, is like a shorter Nocturne ult which can turn a team fight around.
2) so is any adcs
3) not even the strongest out of all the ads
4) yeah the burst is relatively high but thats really all he has
5) his mobility sucks compared to ez/vayne/corki