Let dimension's value be able to make in a schedule
If we can make a schedule of of the dimension's value, we can monitor and highlight where the fractional dimensions are and make necessary changes on the walls.
Why schedule dimensions if you can schedule wall length/height/width directly from wall category schedules? You can even use conditional format to detect irregular values. Anyway, this idea wouldn't work because dimensions aren't attached to walls or specific categories, only to lines/points of visible elements. Hope this will help in case you were experiencing issues of this kind.