I actually like the keyboard-driven nature of the ui, but I also think it's dreadful from a design and usability perspective in its current state. I can't quite agree with the idea of putting usability on the back burner since the game shows no signs of settling down in regards to features. It's like a sports car with broken door handles and no power steering.
I hope it keeps shortcuts too, since that's pretty fast and I agree that it could be improved, but it's not broken. It's the plain jane doorhandles that came with the car. The old ones that stick out 3 inches from the door. It's there, you can use it, but god is it ugly.
Door handle doesn't really cover it though. The UI would be more like the paint/interior part. What kind of lunacy would it require to do all the work getting a car ready to paint, spray it, then try to chop the roof? You'd have to redo the entire car! Still running wires for the radio, but the carpets been tacked in! (Also, ended up changing the shifter from the on-the-tree to a standard 5 speed mounted through the floor since it worked better with the engine you just replaced.)
There's still a lot of work going on with how the game runs. Given how drastically the military screen changed, it'd be kind of silly for him to spend a lot of time working on the game UI when he's clearly not done with how the game itself will work. Since it works as is (even if it is messy), it's better to leave it until he's just adding features and not completely changing parts of the game.