It didn't really affect anything because 1. We were still the best team in baseball and 2. The pitcher, Detwiler, that was thrown into a starting role due to Strasburg being shut down... pitched fine. But. Yeah.
Weren't the Nats literally one pitch from moving to the NLCS? Would Strasburg have been closing instead of Storen if he weren't shut down? Guessing that's a big negative.