The clever thing was, that the scale didn't go from bad to good, they were scales such as:
Low Bar Pressure -> High Bar Pressure
Pivotal Turning -> Powered radial turning
Sits forward in window -> Sits back in window
I agree, those are important
I would also make it more scientific like Ken Winner used to do in those days with windsurfers.
It would be important to check static pull with a force gauge while the kite is parked,
which would give some clue about the L/D and how far the kite could fly at the edge of the window.
Also checking the low and high end wind range for a recreational rider would be important,
with most importantly for average weight rider but if there is a chance do it
with higher and lighter weight also with the same boards.
This way all the unrealistic BS would be eliminated what some brands are claiming on the low and high ends.
Check picture how to start out, but with a more specific and refined version of it