Part of the reason Dirango arms break is because of their rigidity. It's also why their vehicles are so consistent performing vehicles and respond so noticeably well to changes. If you've held the D413 arms you'll know how rubbery flexible they are, hence he necessity for stiffeners.

What we need are arms that exude a touch more flexibility and THEN perhaps stiffeners as an option. In my personal opinion making it so the lower shock mount is captured for added strength and security would be of great benefit.