Holy necropost, Batman. This thread comes from a time when the Coyote platform and any chassis tweaks were still unknowns.
Let me say this: stiffer does not mean safer, necessarily. A car is a safety system and bolstering one part can lead to other areas being weakened, maybe to failure. I'm going to show you the safety system in action. In Sept. I spun, jumped a curb and hit a 10 inch alder with the passenger door of my 2012. That rolled the car over and put her on her roof. I self-extricated and walked away with two busted ribs and no other injuries. It would not have been good for anyone in the passenger seat, had there been anyone, but, the factory unreinforced frame rail stopped the penetration of the tree into the cabin dead.
Now, would subframes have helped here? Who knows. I do know this accident was viewed by emergency personnel attending as likely non-survivable and that these practical experts could not believe I walked out on my own, essentially uninjured.
2014 Premium GT, SGM, Brembo, Auto, Tech, Comfort, etc. GT500s, Steeda UCA, VMP auto tune, 100 shot on BBR tune, best et: 11.38 at 120.85
2012 GT, Candy Red, Brembo, 3.73, Tech, Comfort, etc. Procal tune, Roush upper, UMI LCAs, Steeda red bracket, GT500s, 28X10X16 Hoosier slicks, best et: 11.91 at 115.23 RIP