Not attempting to answer for Lawson here, but hopefully offering additional information for consideration:
Way back in the day, Jensen frameless packs were contoured design too & attempted to utilize a combination of compression type compartments to constrain the contents of the pack sufficiently tight enough to resist any compression forces(vertical or horizontal) ... thus acting as a kind of a de-facto frame.
By analogy, think of a aluminum can of Pepsi.
With an unopened can of soda, it's the soda contents that give the can a much higher level of structural strength than it would have if the can were empty.
That's because it is the soda contents itself (being constrained in the can)that resists any applied compression forces. Without the soda contents inside the can (& it being constrained), an empty aluminum can has only minimal structural strength.
Jensen Packs' design was meant to work utilizing the "same" principle.
Jensen Packs are still made by Rivendell Mountain Works:
The site shows how the contour design with its the three compartments (two vertical acting as two stays, and one horizontal acting as a hip support) that give the pack a functional form to hug your back without collapsing
I've used the Jensen pack design back in the day, and if the carry weight crept up, it was a challenge for me to get the contents sufficiently packed to provide enough structural strength to support a carry weight beyond 90-32 lbs.
(Thus, I have a much smaller pack today and I wouldn't want to carry that much weight for very long, preferably not at all ;-)
Good to see efforts to raise the bar on this type of design direction.