Not really, I have to disagree with you pal. In OU, where things like Genesect, Dragonite, Heatran, Skarmory, Aegislash, Lati@s, Charizard X and Y are present, Leaf Storm has not the best coverage.Aegislash not getting
And a quick thing about Serperior: That guy might not have much of a movepool in this metagame, but the Serperior-lovers can rejoice at the fact that Inverse exists. Grass is such an awesome offensive type there that Contrary Leaf Storms are all you really need.