Let's break it down:
0CP: Royal Fngineers can be upgraded with a flamethrower
2cp: Infantry will get an improved cover bonus while fighting in cover and will receive their regular bonus out of cover
3cp: Elite infiltration troops who are experts at disrupting enemy supply lines. Can be deployed from ambient buildings.
Full list
Those are my key complaints
Pretty sure the ability is only on certain time for an ammount of muni
and you talk about commandos like they cost 150 MP