I would have voted for Rendon over Strasburg. Rendon played in every game and delivered huge hits in Game 2, Game 6, and Game 7. I was honestly surprised to see Strasburg, who only played in two games, beat him out. I suspect voters were violating the rules and taking the Wild Card Game, the NLDS, and the NLCS into consideration as well.
Of course the biggest hit in Nationals history now belongs to Howie Kendrick. Suzuki also hit a game-winning World Series home run and earlier in that same game cut down a runner at third base who would have certainly scored otherwise.