Just a tiny suggestion: when in the codex, make it possible to turn to the next codex entry with a button press.
At the moment you have to click on a entry in the list to view it. That makes it bothersome to read multiple articles for comparison. For example, if I want to find all weapons in the strike role I have to aim the cursor and click over 60 times and scroll in between.
I don't care which key, could be arrow keys, could be the wheel or right and left clicking on the entry text for forward/back.
I hope that's easy to implement, would be appreciated.