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The DuraTorque axle, unlike the straight or dropped axles used by many other manufacturers does not lend itself to modification of mounting. Reading the information on Inland RV's site about the Dura Torque may answer some of your questions regarding this particular axle:
Inland RV Dura Torque Axle Article
The other issue that you would encounter with a nearly new coach is the likelihood that such modifications would result in voiding the manufacturer's warranty.
Typically when you read of axles being flipped or spring mounts being changed to gain clearance on an Airstream it involves a pre-1960s trailer that had a straight dropped axle with leaf spring suspension rather than the Dura Torque axle(s) that were adopted in the 1960s.
Kevin