Here's the situation:
Fleet doctrine is carrier based FAC squadrons backed by a command ship with a big honking size 50 active sensor. Sensor finds the target, FACs go in to max missile range (which is beyond where most thermal pasisives can detect them), alpha strike, rinse/repeat. Brutally effective; too effective.
Enter a new NPR race (SM'd in to be high tech) and I am engaging a fleet of theirs for the first time. Usual tactic, though I fire a light salvo to gauge missile effectiveness. Too light as it turns out; no ships destroyed and they turn on their 73mkm resolution 16 sensor, painting the FACs, with predictable results. They then TURNED OFF the sensor again. Which of course allowed the follow up squadrons to use the same tactic and obliterate them with full salvoes.
Which begs the question of why they didn't turn their actives on as soon as they were painted by my sensor ship (which incidentally would've forced me to disengage and go build missile cruisers).
I would think a rule of "he can see me, I might as well light up all sensor ranges" would make the NPR a lot more effective. Would ensure those long range missile salvoes get spotted further out too, let alone sneaking in small ships. I can see holding intelligence back regarding sensor capabilities, but I don't think the NPR will ever be able to play that game convincingly against a human. I would think fleet preservation would rank higher; the player still gleans that info, only via salvaging wrecks instead.