You are all putting far to much effort into this thread...
But I think it is worth pointing out a few things, first being that in your so called "fair versions" of aikido etc, you can still do all the cheap plays, there is nothing you can do to game rules in aikido to prevent lifts. When I am playing someone and I have double hand grabs it is then easiest for me to lift someone all the way out the dojo.

Another thing you said was about "leg grabs" being under cheap play but, leg grabs can actually be a pretty good counter move to lifts etc, and all these other so called cheap moves work well as counters.

Basically in your fair mod it allows a garenteed hand grab where lifts are garenteed and counters are harder to do because of the lack of alternative grabs E.g legs, glutes, shoulders are all removed.