The Oilers problem in hockey, in general, isn't scoring goals. The problem is they have to play letter perfect D everygame to not expose their medium goaltending. Having to commit resource back and work hard in own zone is impeccable, and good habit, but invariably it leads to less goals scored both ways. The Oilers can't run and gun with the goaltending they have and try not to. The Oilers have some of the best scoring players on the planet. The most obvious position where improvement is needed is goaltending. That was the inference at coach firing point, that was the inference last spring, that was the inference before this long win streak. Just because the Oilers team have been playing some real leak proof hockey shouldn't disguise the critical point that we need a premium goalie in net. Some other teams we face in playoffs will have them.
Another point is that the Oilers may not be the best close game winners on the planet. Particularly in playoffs. Some team are designed, and have the mindset and cool and calm to consistently win one goal games. I'm still not convinced this Oilers team is that, or that they don't ever get rattled. It has at times been their downfall in playoffs.