Good info Sam. We have been using the .219" material since 2004, but we designed a new front bar several years ago due to the increase on the 2011+ cars, we just have not gotten around to releasing the front or rears.
We have been fighting with releasing the style bar that Whiteline offers for the rear, but between not wanting to add that weight to the axle...and time constraints, we simply haven't gotten around to deciding if we are going to go that route or simply scrap it. It is a really nice piece, but we are aware of why Ford chose the S197 rear bar set-up...and we agree with them.
One of the reasons I DO like the rear axle mounted design is, clearance, compatibility with other parts, and the ability to cross it over as a Drag-Race Anti Roll Bar (thicker and stiffer mounts)
Sam, are most of your customers actually utilizing the shortest(stiffest) position on your front bar?