Someone like me can find this kind of thing trivial, because I always read the controls. However, I understand that that big list can seem overwhelming at first and a new player might not want to comb through it before interacting with other players.
I suggest a more simplified "Getting Started" like page that pops out just like the MOTD. It could take priority over the MOTD until a "show this first"-like checkbox is unchecked. Of course, a button on the clipboard should be included so that it can be brought up whenever desired. And if possible, this page could have tabs for different, more simplified categories of controls, such as communication, basic flight, shooting, etc. These tabs could be written like a short tutorial with a link to the currently set key for the command, whether default or modified, such as "To start the engine, press { E }".
Something like that, perhaps?
