Fausts are good for snaring, they don't do serious damage like schrecks, and against decent players they will just reverse their vehicle as soon as they see volks come running, and flanking is just wishful thinking, considering the lack of urban maps nowadays
I dunno about you, but I'd rather have a pak than that cheesy raketen
Yeah but the fact that volks (and all other mainline inf except sections) can force away tanks is not to be underestimated at all, even against good players. In a way, they're just as threatening as schrecks since they can make a tank a sitting duck and just their existence coupled with the fact that they are on a majority of the infantry on the map means that tanks have significantly less breakthrough ability on their own and can't just steamroll at walls and suicide dive other armor all day.
Rak can also cloak and retreat, so that's pretty nice. I actually like them a lot.