Good ideas, guys. I'll be honest upfront and say I'm not volunteering to do any work just yet. I'm a newbie with CMSF, and am still learning, but did want to make a quick point about gameplay choice...
When in PBEM or WEGO mode one must be very wary when issuing direct targeting orders, especially to AFVs with limited supplies of HE shells. This ammo is really quickly used if an AFV is left firing for even 1 full minute.
I have started to use the real time gameplay mode. Using frequent pauses to issue orders; particularly targetting AFVs to fire HE rounds into buildings where suspected/spotted AT teams or other infantry lurk. In these situations just a few (2-5?) well placed HE is often enough to render the people inside not keen on shooting back for some time.
Hope this observation is of some use.