I think a lot of the stuff you guys are talking about is already on Ford's radar....
My 2008 BULLITT
seems to be a test bed of sort for the next generation of Mustangs
CAI from the factory
Better seats with side bolsters
nice short throw shifter and easy clutch
I think the most important things Ford can do with the next Mustang are:
1. Lessen the weight and get closer to 50/50 distribution fr/rr
2. Turbo-V6 to increase power and maintain fuel economy for the entry level Stang
3. 5.0 L V8 for the GT with Cylinder de-activation but capable when pushed of producing 400 RWHP
(first three would all help Ford with meeting Congress's mandate for CAFE)
4. True Fastback---I wish I could get a kit to modify my BULLITT to more closely resemble the '68s
and as for T-tops, I agree with earlier post, I think that's more of a GM thing.
I like the glass roof (its dark with an all black interior)
Just my two cents ( maybe more like 3)