Well I assume we all have a numpad on our keyboard (except maybe a few laptop gamers with small keyboards), so a keypad layout would be expected. Even thhough the phone key layout makes more sense (going from top to bottom and left to right, just as the map grid starts in the top left).
Hmm, actually, I suppose that it would make more sense if it followed the same structure of the main/parent grid and start in the top left. Aye.
An other thought that just came to mind (again) was to remove the "auto tracker" on spotted enemies where they light up and you can see there position being updated (ea: they are tracked). It would be nice if it would only indicate their position at the time of spotting together with their heading (should be possible not? Since the game can show were people are looking?).