Feuersturm has bad abilities:
MP 40 bad
Opel bad
Hezter bad
Fire barrage bad
I wouldn't agree completly on this. Commander needs only small ajustments which they should be done in first commander revamp patch.
MP40 are quite good upgrade, i use them time to time and people underestimated the power of this upgrade. Volks gain RA buff that allow them to get close, smoke nade helps with figthing vs long distance units. Plus it's only half of what ability gives. Flamer for sturmpio is just insanely good.
Opel Blitz is trully bad. 1 small change - adding ability to heal like ambulance would help it a lot (or also add ability to transfer into a resources cash to make it more usefull late game)
Hetzer is a really good unit, it's just located in bad stop. Mostly people go for fast P4 becouse it can also fight vs vehicules. If you get hetzer you have to relay on rakktens which usually doesn't end well.
Fire barrage - it;s just too expensive
Stuka barrage - perfect vs static artylery like ml-20. Only this ability can consistently kill it, others even zeroing artillery may not kill the weapon but only decrew it.
But i wouldn't continue discussion about Firestorm. This is a thread about new commanders only