I mean, even if you will magically have the power to propel yourself to a high level, jumping down won't slow down your decend. If it did, it would heavily eat into "feather's fall" functionality, and becoming a far more useful version of it. Granted on occasions you might need to drop further then superjump allows for, but I don't know how many instances of distance like that are in the game... drop to underdark perhaps?
I would be satisfied with UI indication when jump you are planning to make will result in damage/prone.
