Infotainment;
Generally, making it less glacial would be nice.
Does anyone know what the Operating System is? It'd be nice to have Android and the ability to install particular apps - like Navmii with its perpetual free map upgrades
A few gig of built in memory for ones music would be welcome.
Phone section could do with reporting connected network ID, signal strength and phone battery SOC. Had all that in the Passat and it was quite useful.
General
"Charging door not closed" warning.
USB 5V outlet on the windscreen module for dashcam power.
Properly folding back seats
Frunk (froot?) liner with storage for Type 2 cable, granny lead.
12V battery isolator for reboots
Sunglasses holder
Full LED headlights, stop, tail and indicators.
Bigger battery.
90kW or higher charging support, 350kW ideal
12V outlet in the boot for coolbox etc
Cool air bleed into glovebox from a/c (keeps choccies crisp for a long journey. Had it in the Passat and nice it was)
Full size spare..
Removable accessory head restraint covers.