So Yes, Draven Was Too Good
But I personally think that the nerfs went way overboard and changed nothing. His passive was the only thing that made him good because with it he could hit his late game much faster than anyone else. You didn't make him less oppressive, the counter to him is the exact same as it was, just you have to do even less of it now.
A: Draven doesn't die to a gank or his lane and gets rolling B: Draven gets ganked twice (instead of three times) and is completely worthless forever.
His passive should be reworked to make it more interesting. "Catch a bunch of axes while farming and then get a kill" isn't super impressive. I would propose that there are specific feats that are difficult to pull off that give Draven more gold permanantly on a kill. That way, he can still ramp into late game faster than other adcs but his gameplay doesn't get boiled down to "did I get ganked a fuck ton?"
Idk, I'm just ranting at this point.