Are you guys allowing the use of the Formations? Those are useful & can save points in a build. A good mix of armor & infantry is helpful. On the Underground forum, there are some build ideas available in the builds section. Two good shots are sometimes better than one super shooter.....just some thoughts that might help.
Shellholes-Do not block LOS. Cover for soldiers only. I forget if it is on 4+ or 5+. Ober, do you know the answer? Also, should it be only non-artillery or should mortars, 60 & 81/82 mm mortars get cover also? Towed artillery does not get cover. I would allow mortars to have cover but I'll let the players decide this.