One of the greatest uses of tanks is that of the double blind bluff. Recon is key.
I agree. The "Fog of War" can be a force multiplier for players, or death. My main character was a scout and the GM ran strategic-level campaigns where teams spent a lot of time maneuvering while I specialized in hunter/killer efforts to "poke their eyes out" and knock out their scouting elements. Active Probes and ECM were worth more than their weight in gold.
My GM was always entertained, and said it was like watching "Spy vs Spy" as players maneuvered under double blind conditions.
I've played both Defender and OPFOR in the Luthien campaign, which the GM ran several players through, commanding their personal units. Despite their equipment, Clan forces lose air supremacy by day two, so enemy air assets can track your formations almost at will.