Well, it is not "sacrificing a third of your fuel income + 20% of your ammo income"- good either. Vet 5 is hardly ingame (except for Volks) and as shown not better on some units. The fact that it is indeed only on par with regular vet in some cases, yet harder to reach, is a joke.
If you do not see the point I´m making here, I have nothing further to discuss with you.
Exactly this.