Night missions would be significantly improved (in that they would be something more different from day missions) if there was a proper "fog of war" which we couldn't see into at all. It might also be good if we couldn't see which units were coming next. This would make it really difficult, but strategically building into the fog would then be of more significance.
 "Cursed Treasure 2"){kind=icon}
 "Paladog"){kind=icon}