Draven's Q was initially bugged to deal less damage at the start of the season, which was micropatched within the first week. Players are also trying Essence Reaver over Bloodthirster, which currently performs worse. After accounting for all of these factors, Draven's still not doing as well as he was last year, so we're coming to prop him back up by reverting one of our preemptive pre-season nerfs.