I have no idea if VW made any improvements in the later years to minimize or reduce the wear in the valve body.
The valve bodies do not outright fail, the shifting just gets sloppy and harsh.
Changing the fluid may help, but this is a design and material issue more than a fluid related failure.
VW "should" reimburse you, legally they are obligated, however, with CarFax and some other databases if the mileage does not jive they may try to deny coverage?
Just plan on dealing with it otherwise buy a Toyota or Honda.
Unfortunately these cars have issues, rear window will likely come unglued at some point as well. Mine took 10 years, others happened earlier.
Door latches will likely need replacement at some point, but if you learn to carefully close to the door and make sure your passengers do not slam the door like there is not tomorrow you can reduce the need for door latches, but at some point likely you will have issues. My 2003 is on latch #5 & #6 at this point at 84k miles.
Just maintain the car the best you can and hope for the best.