I have a long list:
UVO Link in USA, please!
Android Auto next turn display in HUD
Tach in HUD, with shift light
NO polarizing filter in HUD, or at least orient the filter on all displays in the car to work properly with polarized sunglasses
NO speed limiter (let it be power/drag or redline limited, not some arbitrary cutoff speed; some of us may want to do an open road race event like Big Bend)
Rear LSD (Limited Slip Differential) in AWD models
UVO Link in USA please!
Adjustable limited-slip center diff/transfer case (see: c.diff in WRX STI)
Proper boost gauge
Headlight leveler in US market (be the trailblazer here!)
Rear
fog lights in US market (most won't know what it's for but I love that feature in Saabs and BMWs)
UVO Link in USA please!
Reclining seatbacks for back seats (see: Subaru Forester back seats; they recline!)
Stiffer swaybars as an option
Better utilization of the adaptive suspension (See: ECS10)
3D gauges in US model please!
Widescreen infotainment display (so I can use AA's new widescreen UI)
UVO Link in USA please!
MUCH MOAR POWER! (Stinger GT-R? Americans want more power!)
Open airbox (I want to hear those turbines spool up!)
EVC exhaust in US models please!
Extend
ambient lighting to under seats and back
seat armrests!
Larger shift
paddles!
Harder brake pads. We don't care about brake noise in our sportscars. We
do hate pulsating glazed brakes that are prone to fade!
Drift mode for GT2!
FM+HD radio pause/"rewind" buffer (see: Subaru's head units)
Better speakers not just HK labels slapped on cheap drivers!
Flex fuel capable
Screen or mesh to keep stones out of the brake
vents, intercooler
Functional hood
vents (why not let the leverage airflow over the hood for scavenging to help improve under-hood cooling?)
CD player OR support for lossless media files
MirrorLink support
XPel Ultimate paint protection option
Insulate ductwork under center console (or at least under the phone charger)
Wireless android auto support
Quickcharge and/or PD USB ports
TWO USB ports up front
At least one USB port in the console storage compartment
Did I mention UVO Link in USA please?