Yeah, it's mainly been because of Lehner so far. They need to sort out their PP and also get Cowen and Stone and Da Costa back from injury.
Every time I have seen them play, it seems like they are facing a hot goalie (like the real Sens...). Mike Hoffman has 1 goal on 28 shots, Zibanejad has 0 on 22, Silfverberg has 2 on 21. They need some luck!