There is still some holes, and big ones by that time lets just say that. The article is extremely long. They end up needing a top line winger, and a top pair D. It highlights that it is possible, but also kind of highlights how difficult it would be to. So thinking about it some more it also kind of helps your point.
That game score stat has its flaws, and Zadina should be higher if he pans out. The one on the left is an average for the top 8 teams in the NHL today. (Tampa Bay, Toronto, Calgary, Pittsburgh, Nashville, Winnipeg, San Jose and Washington)
Here is Dom's article on game score
Measuring Single Game Productivity: An Introduction To Game Score