Some more info from the indiegogo campain. I haven't updated anything on mine yet, simply because it seems to be working well without it. I still get wifi disappearing quite regularly but it only ever happens from a cold boot not while I'm using it - so far at least. Restarting a couple of times usually fixes it. Hopefully this can be fixed with an update.
1. GPD WIN 2 Built-in Full-featured keyboard firmware https://mega.nz/#!XwshwDDK!JN4yhOSSftGxoqM9cd84
Description: The updated firmware cancels the keyboard wake up function, that means the keyboard that comes with hibernation cannot wake the system, it needs to press the power button to wake up, this will not affect the self hall-wake.
This will repair the wake up issue which is caused by shaking or squeezing the device in the bag or pocket.
2. GPD WIN 2 Built-in gamepad firmwarehttps://mega.nz/#!f4sxxJ6T!qlz13KV8W8ykq7pRJHbt
Description: This firmware will change the gamepad boundary value, provide a better experience when gamepad plays at 45 degrees.