It looks to me like the edge diffraction would all arrive at the same time for an on-axis listening position, and therefore would have a greater effect on-axis than would be the case if the drivers were conventionally mounted on a rectangular baffle. So depending on the radiation patterns and crossover design choices, it is possible that the ideal listening axis is somewhat off-axis, which is probably not a bad thing.
From the standpoint of imaging, it is arguably desirable for the edge diffraction to happen earlier rather than later, this being one of the differences between a narrow-baffle speaker and a medium or wide-baffle speaker, and imo being the reason why narrow-baffle speakers tend to image a bit better.
It does catch one's attention, doesn't it?