If https :// www. heroesprofile . com is correct, and the trend is running.
Than samu dropped from 52% win rate overall to 47% win rate overall.
More extrem, his only build with over 50% win rate, is illu master build. All bladestorm build dropped from even win rate overall to 40-45% win rate.
I would say, the samu change failed his goal, from two ways, with two similar in win rate ulti, down to excatly on build, on ulti char.