Hidden units and visibility improving

[ComradeP]

I agree that it adds to the tension, and sometimes it feels lame to have spotters that probably would not have suitable communication equipment hanging around in the enemy rear for some cheap artillery shots at units moving up in T-mode, so fewer spotters can make a game feel better anyway.

As to recon spotting: in many scenarios, the front is usually either so wide that it's not particularly effective or you have few if any recon units. That can make it difficult to find hidden units.