I do believe one of the weakest points of the game is foxholes and trenches. I know we wanted them to be FOW but I wish they were different somehow. As of now they are always spotted in LOS even though they are FOW which makes ambush impossible from them, they don't offer the protection that they really should, they don't really but up against a hedgrow well at all, and they are ugly.
I think what Steiner was talking about was CMx1 style 2D foxholes and trenches and our troops bodies vanish when they go into them so just the head sticks out. No deform of the land.
To tell you the truth I really dislike the current foxholes and trenches.