Off topic for this screenshot thread but it's fairly easy to change the formations, it will just need thorough testing in various weathers, groups, waypoints etc Also the merge could be much more chaotic / collisions. We improved the AI dramatically with better collision avoidance so they may handle very close formations a little better but it would need testing of course.
BTW it may affect other things sudden turns, landing timings / collisions and so on - hopefully not.