I don't think it's fair to compare Dubas with Lou. They clearly have very different philosophies on how to build a hockey team. Players like Matt Martin and Leo Komarov who we let go are now contributing on Lou's team. Martin has 6 goals already this year, lol. Lou created a 105 point Leafs team and is now creating a contender with the Islanders, so I don't see how you can argue with the results.
I think Dubas is still figuring things out. The first year, he created a highly offensive, but soft team and it didn't work well. This year, he bought in Simmonds, Brodie, Bogosian, Thorton and it's a step in the right direction. Dubas is still evolving as a rookie GM, but he was handed a very good team to start, so mistakes are very glaring. So far, I'd say he's been average, I didn't like the contracts he signed the big 3 to, I didn't like the Kadri trade and I'm not sure if the "draft for skill, trade for size" will work out, but I do like the Muzzin trade, getting Campbell, stealing Robertson, signing Brodie. I think this season and next season will define him as a GM. What he'll do at this deadline, what happens to Hyman and Rielly's contract and what he does in the offseason.