Hidden units

[Steel God]

There is also the consideration of the size of the recon unit.  Larger recon units have more eyes and see more in PzB.  However, they can be attacked as recon units expend MP so they in turn can be spotted and targeted.  Think about the optimum size  where the recon unit is effective in spotting but not so large (company size) as to attract many casualties from enemy opportunity fire.

Dog Soldier

Hmmm, didn't catch onto that bit not recon spotting, but the size of the recon unit).  Makes good sense though.  Like PzB more and more.