I think passinglurker is simply trying to hold squad to a their own standards of quality. It doesn't quite make sense for the devs to release parts/textures that are in any way half baked or not consistent with the level of quality and detail found in the rest of the game. It may seem like he's nitpicking small details, but being lazy about the small stuff can snowball until three dlcs down what we get is really bad compared to the stock game.
And I think the barn was bad in many ways, not just texture. Any kind of industrial warehouse could have sufficed in it's place.