Yeah, I wish they hadn't omitted Ennis's confession about his gut cramps too....but maybe it would have felt wrong for "movie Ennis" to say something like that when the rest of the time he says so little?
"Story Ennis" is much more talkative about his feelings. There's times when I really wish some of the other dialogue from the story had been included - things like the "I like doin' it with women but, Jesus H, ain't nothin' like this" line and, of course, "I sure wrang it out a hunderd times thinkin' about you" (man, I would
love to hear Heath say that line

) but Heath does such an amazing job at conveying his thoughts and emotions with his face and eyes that maybe it doesn't matter too much.
Not sure about Ang Lee's thoughts about Ennis demonstrating his love in later scenes, mind - the most powerful demonstration of Ennis's love comes in the reunion kiss, which takes place before the motel scene and I can't think of anywhere later in the film where Ennis admits his feelings???
Don't suppose anyone knows if they actually filmed any more of the motel scene and then cut it?