Mentioned it before, but if Boston hard matches the Bergeron line to Matthews, offloading Komarov on the Matthews line gives you: a) the ability to have Komarov on Marchand and b) improves your other lines by not having Komarov on them (ie having Johansson on there instead). Theoretically your lower line depth is much better and is an advantage. Then your top line getting neutralized isn’t as big a deal, as long as that line can hold its own against the Bergeron line and not let them get 500 goals.
That’s likely Babcock’s thinking.
Gotta hope it works.