My list:
- keyboard design that does not suck. P2Max is a failure. Hire somebody who has good experience in the field. Crappy keyboard is a major turnoff
- better energy efficiency - idle (static) power consumption is too high. Pocket2 is much better
- get rid of the fingerprint gimmick, unneeded cost and power consumption
- a dedicated or a Fn layer button for turning the fan completely off, like Pocket2
- make a difference - provide a BIOS that is not crappy for a change. Work with the users to polish the remaining bugs
Optional:
- place USB A ports the normal way
Very optional:
- provide a matte screen with less PPI and almost no bezel. 1280x800 would be fine. Now I know this is not going to happen, the market for screens is limited and I guess GPD don’t have much choice here - they just use whatever tablet screen leftovers are there and then build computer around them