IMHO it's a bit stupid. Instead they should just have limited range like the others. Artillery turrets should have an arc in-atmosphere. I can see where they're coming from - they don't want people in OP ships shredding apart bases in seconds with mass amounts of turrets, but then again a good-defending base could defend if the rest of the turrets worked in atmosphere as well. I do hope they at least add a way to enable them in-atmosphere. If there already is please tell me how to do it! Also what are your opinions on allowing things like laser turrets in-atmosphere? The aliens can do it - why can't we?