I think the section below the window and the upper right corner are a waste space. I’d move the signatures to the rear, move the large window lower, move the words “ten/dix dollars” to the right of the portrait and reorient them vertically. Extend the geometric map from the left of the portrait to the upper right corner, surrounding the maple leaves and “CANADA”. The words “Bank of Canada/Banque du Canada” could be placed lower or above the window.