I am convinced that Ostheer desperately needs the ability to make green cover. It's a serious drawback, being able to put down green cover (sandbags, tank traps) is what you need to punish units that try to close in, it's also making harassing more effective, because when the enemy tries to clear a cutoff which is protected by green covered units in ends up in a loss or significant mp bleed at least!
Well, you have trenches.
Its not OKW, can't have everything stock.