Also, you have confirmed that there is a bug with the pack howitzer that makes it a vehicle if a past vet 2 pack is recrewed. Amazingly, reinforcing it and destroying the weapon as well as critting the weapon gets you a squad of useless entities that think they have a disabled weapon of a weapon they are no longer crewing. I wonder how that works...
Normally when the weapon of a support team is destroyed they get the order to retreat to the out of bounds area, but since the weapons is seen as a vehicle they don't get that order I think.
Its for example easy to mod so that the squad stays on teh field when the support weapon is destroyed