Talk about mundane, but here it goes:
In the finished version, each of the four principals, Ennis, Jack, Alma, and Lureen, has one nude scene (maybe seminude--topless--is more accurate for the women). Then Ennis and Jack have one nude scene together (jumping off the cliff)--although we might presume they are nude in the bed in the motel.
So if Jack had been visibly and obviously (to the audience) completely nude in TS2, he would have had two nude scenes (not that I would have been bothered
)--not to mention that Ennis was nude in the background, while Jack peeled potatoes, while Jack's nude scene, doing the laundry, is pretty clear in focus.
Was this sort of thing an acutal consideration? I sure don't know, but I think it's interesting that it worked out this way.