You mean color code the threat level?
0-1 green
2 yellow
3 red
Regular POI (1-3)
Elite is always 4
Boss is always 5
Kind of, but the player can somehow set the limits for what they think is acceptable threat levels.
In the beginning, 1x lvl 3 enemy might be too hard & = red, but at late game like 10x lvl 15 might even be preferable (because of increased XP rewards), and with maxed out POI-researches it would be nice if it was possible to make a "filter" to highlight the interesting POI-locations.