Additional feedback on the gameplay: Im guessing the vehicles the IFVs somehow are garrisoned inside the building....I thought it was intentional during the random spawns but i guess it turns out to be a bug where enemy IFVs are settled inside the building for an ambush thanks to the walls being cleared out by explosions or what not, sometimes a hangar-like warehouse that are open in both ends for infantry (IFV Tutorial for example, down the alleyway towards the end, a building that looked like a warehouse and its visible from the infantry's pov to see a tank on the other side).
Think this bug would turn to a tricky ambush spot for enemy armor? Could also be a decent defensive spot for defense missions
Turning that bug into a mechanic seems interesting, I can see it in defense missions like you said, or maybe you catch the enemy base off guard in a mission and hit their hangars!
Would need to think it through however, since there will probably be lots of pathfinding and gameplay work. I will consider it in the future when buildings will get reworked.
Maybe go for buildings that are a little more accessible (wider) for tanks to fit in like a warehouse from the Tutorial mission where the infantry can easily see? some designs that could help it a little easier on your load before you would refine them once the major ones are dealt with.
Also it may be more dangerous since its often on the enemy's perspective during our offensive operations so its like a PEEK-A-BOO thats often used by them rather than us in defensive missions. but then again you can always make a new mission that involves alot of garrisoned tanks, also what are the chances of a HULL DOWN enemy tank during our sweep?