Quick update on this...
I went on a group ride (at least 20 other vehicles) and got to test out the new tires on some icy trails. They did great and I'm super happy with the size, handling, and traction on road and on trail. I had no issues on sections where some other folks slid into ditches or had to to back down and re-attempt icy sections. Of course, a lot of that can be choosing the right lines, speed, etc. (and some random luck). In any case, it was a great first impression of this wheel/tire set. I did a little "brake testing" on the ice and snow going down slopes and these are very grippy tires. I know a lot will depend on specific tire sizing, weight of vehicle, wheel base, etc. - but for my '97 TJ, this wheel/tire/geometry has exceeded my expectations. Based on what I had been reading and my experience with my other wheel/tire set in similar conditions (and a lot of experience with other vehicles in icy conditions), I wasn't expecting such a night and day difference.
Changes in tire PSI due to temperature, elevation, weather changes have been annoying too. So I'll just say I aired down a little for this ride, but could have gone much lower. I suspect I wouldn't have noticed much difference for this particular ride.