Unsound - I concur with the merit of balanced EQ, and balanced operation in general. I am not the guy to develop that solution; I hope that someday we might find that resource. But the issue of over-driving with "modern" high-impact music and effects still persists. Getting THAT much output from a 10" woofer and 5" midrange with first order slopes is a really tall order.
I'm prototyping a grille that looks stock (for history), but is made of 1/4" round bar outboard and proper roundings inboard. Should be pretty transparent. Also, a properly rounded inboard frame with no outboard element - no fabric, just finish the baffle curves like the CS2.2. Come to think of it, the 3.5 development prototype had just such a half-frame.