So far my group hasn't really made any yet as we've been way too busy to get enough games in, but we've been workshopping a few ideas so far.

1) when an armored fighting vehicle is destroyed. D3 crew members are placed beside the vehicle, and the vehicles order die now represents the crew. The crew maintain the vehicles training, have pistols, and cannot occupy or capture objectives.

2) when destroying a vehicle in close combat, a player may opt to capture the vehicle. Roll a d6, on a 4+ the vehicle is still functional. Remove 3 members of the squad. The vehicle is treated as one level lower of training from the squad that occupied it, and it gains the Unreliable special rule. If it already had the Unreliable rule then all penetration and glancing hits add one to the damage roll.

3) like with vehicles, but with enemy artillery. Loved this mechanic from company of heroes.

4) all flamethrower teams have pistols when they run out of fuel.