While I admit that I may be biased, I feel that the AT really hits a sweet spot as long as you can be happy with a short action chambering in a standard (.473") bolt face. I generally prefer the aesthetic of the AT chassis over the AX, and appreciate the fact that the scope can be mounted lower due to the lack of a barrel tube/shroud. The AT gets you everything that's part of the AX308 except the gee-whiz right-folding butt stock (which I admit to coveting) and the extra rail space.
Now, the AXMC is a different beast altogether, as it is convertible between long and short actions, and between standard, magnum, and Lapua Magnum bolt faces. I think that an AT version of the AXMC (call it the ATMC) would really be the mutt's nuts, but would likely cannibalize AXMC sales too heavily.