A few thoughts on the Flight series, based on a couple entirely inadequate photos. As usual, I could be totally wrong:
-Good on SMD for tackling form factor in a major way and introducing some packs which don't look like frumpy suitcases. Irrespective of function, their past packs have been by far the ugliest of the Jardine progeny, and that is saying quite a lot.
-Vest harness is intriguing, and I'm glad someone ran with it in a real sized pack. Those pockets should be handy.
-Cultivating a barrel shaped packbag is a curious choice. I've always been acutely skeptical of sweat mitigation as a design spec, and it seems to me that the main effect of this choice will be giving away a significant amount of bag space, moving the load away from the users COG, and making the pack harder to pack well (ie by it not being a rectangle inside).
-In my book load lifters and the resultant wrap harness are 4-6 ounces needlessly spent, though with only two sizes it is probably necessary.
-I want to know more about how the belt attaches to the pack. The shortcoming of delrin rods and hoops (when they're stiff enough to bear real weight) is that they can't be shaped to provide lumbar support. It seems, based on the photos, that the hoop anchors within the pack, and the belt attaches with velcro (?). If the belt is attached along the full top-bottom distance, that will limit its ability to articulate to an individuals lumbar curve. If the belt were only anchored at the bottom, the plastic in it would likely not be necessary.