It is a good commander, but it all depends on the commander choice of ur opponent. Fortification is ruled out against commanders with off map arty. it's not cheap and u can't always afford to lose it. Zero arty is great but it needs vision and 300 ammo! U don't have access to any call in inf. or armor. I guess it works the best in 1v1s.
Primarily play 3v3 and 4v4 with friends and I keep it in the rotation, but very rarely use it. Luftwaffe almost always gives me more bang for the buck. You get an MG which in certain games is crucial to stop the giant wave attacks some allied players throw at you, slit trenches are great for Mgs and AT pop gun, and you get all the emplacements you need.
And while the falsch are expensive and aren't exactly durable, they can really screw up an opponents day by providing immediate reinforcements to the line or popping behind to end a rocket trucks reign of terror. Incorporate them with your ground forces and the DPS jump is certainly noticeable. The air assault has also saved some very close games at the last moment.
I do like fortifications, but the PAK 43 range almost always feels just a few yards too short. Combine that with the almost constant indirect from allies, and well you just spent 500 manpower on something that rarely lives. But lord, against certain players... its like playing wack a mole with their tanks. Plus, I like playing the spoiler, keeping folks off their game or spoiling their attacks while my friends hold the line. Those minefields, and cheap mg emplacements are great.