Maybe not of great use outside of a group of all formians, but from my reading, the Evaluation ability doesn’t require any actions, just to have line-of-sight for the round(s). In a mass-combat situation, like a war, the Observer keeps an eye on the boss, while its allies fight the front line enemies. After two minutes of mopping up mooks, all the formians (within 50 miles!) get +20 to hit the leader. Then it keeps going up from there. Still situational, but can be quite helpful.