The "Army Fortress" Commander Tree is just a complete mess.
1. Improved Fortifications:
"Famo can construct Panzernests plus Stormpioners, Lansers, and Panzerfuliers can construct Foxholes."
What is "Famo"?
2. Panzernest "Primary defensive structure. Can upgrade to aid station, repair station, or MG emplacement."
-Nope, it can't do any of this. Once you build it for 200 manpower and 25 gas, it does absolutely nothing.
3. Ambush Tactics
-The camouflage provided by this ability is very buggy. Units sometimes won't even fire when an enemy walks into their range (even while the hold fire ability is off).
The "Ambush" ability possessed by the Stug IIIs and the Panzer IVs etc is also extremely buggy. Replay attached. At 27:30 look at the Western most side of the battlefield. The Stug III goes into "ambush mode", cloaks, then as enemy units approach a few seconds later, uncloaks, then does nothing except get destroyed until I turn OFF ambush mode and force it to retreat.
At 31:30 a group of Lansers (Western part of the map) in automatic camoflauge mode (Ambush Tactics) does absolutely nothing while a nearby enemy squad attempts to take a point. They only fire when specifically ordered to. Continue to watch this area and you will see many more examples of this weird and buggy behavior.
4. Panzerfuliers
The description states that they get the "grenade shower" with the assault pool and "disposable anti-tank weapon" with the support pool. This is untrue, both abilities are available regardless of which pool is chosen.
I'm sure there are a lot more I forgot to mention but this should do for now.