Very important feature: Windowed Full screen
This is a really important feature missing in the game. Everyone who has ran the game in full screen and windowed mode should know what I mean (and that neither of those are the same as windowed full screen mode).
This is important and I don't think it would be too difficult or time consuming to implement.
Full screen: You can't look up information unavailable in game from the internet.
Windowed mode: You either play a smaller resolution and so having a screen that is too small for your computer screen - or you play the resolution of your screen to have a full size screen only to see that the bottom 1-2cm of your screen is missing.
Full screen modes needs to be alt+tabable = windowed full screen.