Taylor Hall wasn't a big name on the market because his offense isn't elite like Patrick Kane which can overcome any defensive short comings. You can add a player like Luc Robitaille, Phil Kessel, John Tavares, but don't expect them to be your core. At best, they're secondary scoring that you hope exploits the other team's lack of defensive depth. It takes Yzerman, Crosby, Matthews to be unstoppable two-way forces.
I honestly don't expect Robertson to be able to outscore his problems. I don't expect him to be up against someone like Brad Marchand and win that exchange in any capacity. He's an exciting player, but excitement doesn't always equate into winning or the Leafs might have a Cup by now. I think the Leafs capability to close out a lead has greatly improved. If the Leafs are up 2-0, think they're in much better position to keep it that way if not make it 3-0 as the opposition has to open up even more to try to tie the game up. Expect to see fans complaining that Jimmy Vesey or Zach Bogosian are ahead of Robertson and Sandin in the depth-chart.
I like this team because they're going to be able to play exciting OR dull hockey when they need to.