It's a weird choice. I do worry that Overwatch is going to eventually fall into WoW's arena season mentality
'This spec is just fucked. Maybe next arena it won't be. Too bad if you like this spec!'
As it stands, I don't know what purpose Hanzo has. His ult has become ridiculously niche, his damage is ok but Widowmaker is a far more consistent choice at higher levels, his area denial is nothing compared to Junkrat's.
Also now McCree has full damage mid range shots which was Hanzo territory.