I've recently taken a look at the basic wall structures in FAF to see if there could anything done to address some of the issues people have mentioned.
Took a quick look at the walls models and discovered that the walls main bone is the only bone set as the targeted bone and it's the bone closest to the ground. (All four factions) This can lead to shots vs a wall falling short and impacting the ground prior to impacting the wall.
With this in mind it's possible to modify the walls mesh and add a bone that's centered in the mid point of the walls height. This small amount of elevation wont be noticeable to anyone but will allow for shots to properly connect with the walls hit-box vs impacting the ground.
Can maybe attempt to modify the models Tuesday or Wednesday of next week...
Resin