Make team weapons/stationary weapons(Pak 43, Howies, etc) not be one-shotted by artillery attacks. Let the crew die, but allow the player to recrew the weapon and repair it so you either need to drop double bombs on the gun or a concentrated assault is needed to kill the weapon.
this is a very good idea.
Also I would like to suggest that doctrines with heavy tank destroyers should not have counter to emplacements. for example elefant doctrine shouldent have stuka, so that artillery peices can be used against super heavy destroyers. SIMILARLY isu docs shouldent have il2 bombs to 1 shot pak43s.