Lighter is going to be off the table until the 6th generation / Alpha.
I like the comments above about full length sunvisor, factory rear tinted windows... those are things that are easy and cost effective. More improvements to the DIC - theoretically if the DIC is tied into the same electrical system as all the sensors, with the right programming it could display all the items to make it compete with that news a little while back about the Ford Mustang being able to see a ton of diagnostic info in its DIC.
For the love of god, though, do not make the T2-T3 standard as said above... :yuck:
2014 Camaro 1LT M6 - "Cherry Bomb" - Cold Air Inductions CAI, VMAX Ported Throttle Body, MGW Short Throw Shifter
1994 Camaro LT1 A4 - "Red Alert" - v6-to-LT1 Swapped Cruiser
; Cammed, Stalled, Enjoyed