Totally agree on this one. But, designing a pack has SO many variables! Pocket layout (one big, external, water bottle?), what type of shoulder straps, size (people do come in short through super-tall), color (I agree: something visible, without being hideous), purpose of the pack (eg, day pack, multi-day, BOB only), Hydration pocket compatible... the list could go on.

I think it's a great idea, though, and hopefully one that is looked in to. Personally, I'd be glad to pitch in my two cents.