This is a brilliant idea. I really love it. I just hope it doesn't get implemented into Skrimish mode.
Think about it. If we had white squares around 10+ ships because Adventure mode spawns in tiny weak ships, it'd suck trying to see them. Not to mention this could help divide the attention of "Okay, this is an AI ship, and the white cube is a Human player."
But in Skrimish... *shudder* that outline is so red, so thin, and the picture looks so zoomed, that it must suck trying to see that through a ship or cloud.