He did play a lot of RHD in Sweden so his comfort level with it is good. He said he likes it in the offensive end.
If Dahlin stays on the right, he could make that his trademark, not many top Dmen have played their opposite side.
A guy like Ovi playing LW stands out, in my opinion, because that is not very common. Many left handers have played RW though, like Mogilny, Bure, Richard.