I would like to have the option to take an air surceillance crew to M3.
Once deployed(graphics could present this as a tent etc) the crew would report enemy movements with radio. This could be implemented as a small radius radar. The accuracy of the reports could vary(number of contacts..).
The surveillance camp would be quite hard to spot as it would be well camouflaged by the specially trained partisans - implementation: no icon or sort range of icon.
The camp could be lightly armored if at all, concentrating on the visual cover. Once spotted it would be vulnerable. Given time, the crew would dig holes and such to make them harder to kill - implementation: the hardness of the camp correlates with time after deployment to some extent.
And finally the ability to pick up enemy range radio with varying quality - implementation: the enemy range radio would appear on its own color + there would be a certain delay to the other country pilots in range to receive the messages as they would have to be 'translated' by the surveillance crew or perhaps only the M3 driver would receive the enemy radio traffic.
I realise these kind of modifications would add to the already huge netload, but it would be nice to see something like this implemented if it tested out not to be too big burden.
In the Fin-Rus front this kind of visual-radio surveillance was used a lot and the art of infiltration was mastered by cunning partisans and spys from both sides.