As it is now, a new datum plane has an option for Adjust Outline that has no center point. Only its corners can be moved. It would be useful to have a center point and also have that center point be at the center location of its creation by default. A scale option could scale the plane to the center point very quickly.
Also, when a datum plane is created its outline is built on a size that cannot be preset. It would be helpful to have control of the default size. As it is they are quite large and usually must be resized.
An example is - a datum plane is created normal to a curve and is located on a datum point that was created on the same curve. The center point of the planes Adjust Outline should be the datum point that it was built on, and an adjustment would scale it to that point by default. If it is wished to scale it to another location, or even only use the corners without scaling, then these should all be options.