Also about 1250 miles on mine, Lariat ER. My List:
1- Disable Alexa entirely (via an option?)
2- Disable xm radio entirely (Same, via an option)
3- Remove the key pad on the doors
4- Better display on charge rate/status/etc.
5- Better config of max-charge. Right now, it is a per-charger basis
6- Config charge-rate
7- More consistency with 'rounding' on the different screens and app. Two I've noticed are:
a- The 'current trip' kwh rate differs between the center screen and the big screen with no apparent pattern
b- The 'Distance to destination' always rounds 'up' on the dash (in the area under the range), but does nearest-rounding on the nav screen.
Physically, the truck is amazing, I only have a few little things;
1- My F250 bed was easy to get into with the tailgate down, step on the side of the bumper and grab the 'bump' next to the tailgate closure. This bump is now 'larger', further in, and less 'sharp' on the edge, so its a bad hand hold.
2- Factory cut out the stake-pockets. I did the bull-rings on the back, but not sure it is worth using a router on the fronts. IT would be great if this was just open in the first place.
3- A better solution for the 'bed divider'. The older trucks you could use a 2x6 or 2x8 in the grooves, but this doesn't work because 1 side of it is taken up by the electrical ports. The only factory bed divider uses up the 'hook' locations in the bed, which means I'd have to store those elsewhere.
4- Access to the rear-under-seat area without lifting the seat up. Not a problem for most, but I have a carseat on mine, so 1/2 of it is pretty unreachable as a result.