Con:
-no longer can you attack ground
-you need to make all abandoned/destroyed vehicles, support weapons or other things targetable
-no longer you can clear mines
Pro:
-You can't push out the model with the Panzerschreck
Currently, fausts will hit 100% of the time (unless there's a bug) and it is essentially a homing missile; if the vehicle backs out, goes behind a rock, and is essentially not able to be shot at, the faust will still hit the vehicle.
It can miss and hit houses. I'm not sure what happens with hedges nor smoke. Cautious movement/cloak will make it miss.