The GT is superb on the wrist, not too big, nor too small. Superb, with some awesome watches, such as the Reverso Pt Nr 2 Tourbillon or its skeleton version, or the Sun Moon Platinum, or the Rose Gold LEs.... And so on.
Same for the XGT. I agree that they are a bit chunky, but this was the price to pay to have an 8 Day movement.
As for the UT, their success is lying on their simplicity. Less is more.
A date on a TTR 1931? Oooooh, no, not that!
It would simply ruin the beauty of the dial!
BUT if you are after a Reverso, with a case such as the Grande Ultra Thin, with a Date, so you should try the Reverso Calendar. A very nice triple calendar.
Best,
Nicolas