I have a few issues with chat personally, don't know if it's wider spread, but I would love to see a few options for us.
Firstly I personally feel like some of the colours are unreadable on certain backgrounds, like cabal green on some planets and some infested gloops and I find myself rotating the camera like a maniac to be able to read something someone posted. It would be awesome to be able to choose colours and maybe even be able to set opacity of the chatbox background.
Secondly I would love to be able to have optional timestamps to the messages as they are loaded from the server and I don't know whether a message is 5 minutes, or 5 hours old and whether to react to it...
That is pretty much all I can think of right now.