LeBlanc was like our 6th best LD on the Marlies. McMaster is the same age and can play center. With Marchment out, he may play LW on the 4th line, allowing Timashov to move back up with Mueller and Bracco, and putting Engvall in the Marchment role with Brooks and Moore.
At worst, McMaster is insurance in a much more pressing area than LeBlanc, who likely would have been in the ECHL before the next game. Marlies need depth, and they need to find some cheap forward depth, especially they want to use guys like Timashov as trade chips at the TDL this year. Borgman and Subban are also likely on the move, with Marincin now in the mix and Sandin/Liljegren coming back soon.