I can’t see the value of the Through 2 planes Type. It doesn’t seem that the placement of the axis has any significance (without further info). A practical use example would be appreciated.
On the other hand, it seems to me that a Type - At Intersection of planes would be very useful. For example, one could intersect planes and establish axes at their intersections. Then hide the planes to have a space frame of construction lines. In my way of thinking, any point established on an axis would be in two planes facilitating the auto alignment of sketches, etc.
I find alignment of sketches, say on opposed faces of a Shape, to be tedious and am looking for a better way.