Meh, he didn't improve nor degrade what was here IMO. He made some very bad moves, and he made a few very good ones. He drafted very well. The issue to me is too many of the same type of player. We'll see what happens over the next couple of years.
Some people still keep echoing this false statement. How did Dubas "draft well". What is the measure of success for drafting? Here are the NHL players drafted by the Leafs during the time Dubas was the GM:
2018:
Rasmus Sandin (#29) - Traded
Sean Durzi (#52) - Traded
Pontus Holmberg (#156) - Current 4th liner.
No other picks are considered prospect status.
2019:
Nicholas Robertson (#53) - Hasn't yet established himself as a full time NHL player.
Mikko Kokkonen (#84) - Considered a prospect. Is he viewed as someone with NHL upside? (actual question as I'm not sure how his development has been going).
2020:
No Current NHL Players
Roni Hirvonen (#59) - Considered a prospect but isn't tracking well to be an NHL player (IMO).
Topi Niemela (#64) - Legit prospect that hopefully can become a full time NHL dman.
Ryan Tverberg (#213) - Considered a prospect but seems like a long shot to have an NHL career.
*Amirov (#15) - Rest In Peace young man (this pick is not up for debate and excluded from conversation regarding drafting performance ).
2021:
Matthew Knies (#57) - Established himself as NHL player, looks to be a good top 6 player.
No Prospects
2022:
Fraser Minten (#38) - A solid prospect that projects to be a solid 3rd line C in the future.
Dennis Hildeby (#122) - A good goalie prospect. Could have an NHL career (all goalies are hard to project).
Nikita Grebenkin (#135) - A promising prospect playing in the KHL. Has skills, will it translate to NHL?
In 5 NHL drafts (team would be awarded 7 picks per draft = 35 picks in total). Dubas and his scouting staff managed to select:
5 NHL players:
2 traded
Knies
Holmberg & Robertson still fighting to establish themselves as everyday NHL players.
7 Prospects (maybe, seems like a generous number).