I can get extremely fed with this champion (out of support even!) and still get dumped on by almost every champion. His supporting in the early game is fun, and kinda balanced, I guess.
BUT, he can't get too far ahead because of his stupid passive. The health to ad conversion is so incredibly weak. He always ends up with mediocre damage and incredibly squishy stats. What a disappointment. A quality buff would likely just be removing the CONVERSION of hp and turning it into a bonus sort of thing. The passive feels like it's ruining the champion.
edit. What I mean by him being thrash is his mid to late game: He falls off completely, not slightly or appropriately.