You should never have to force the car into gear with a new, healthy transmission. It should last the life of the car. The B6 has been used in much bigger, more powerful cars than the FiST.
It's not a weak point.
It has a case that's unique to the FiST, and it holds less fluid because it's narrower, but it's up to the job.
I'm guessing it needs a cable adjustment.