I've done 100+ suspension installs and I've never had any issues on my cars or "customers"
The only bolts I replace are the strut "pinch" bolts (at the spindle/base of the strut)...N90954802
And then I replace the strut bearings...very crucial to noises.
When disassembling the struts, I've had the strut bearings just fall apart in pieces in my hands. And with extra miles, dirt/grime/salt just builds up in them and contaminates the grease inside (working it's way in). And that's the only moving part of the strut & where the spring pivots....which leads to noise (spring popping) if it's not turning properly/cleanly like it should.
Making sure the mount (and bearing on the MK7) are lined up/oriented properly is crucial.
The spring too, lol. (should be common sense)
If the car is older/lots of miles, I might recommend replacing the mounts too and the strut mount bolts or possibly the endlinks too....but you have a newer car and wouldn't be necessary yet (IMO).
This is how I do it, doesn't mean it's right, but I don't torque to the factory specs either. I did it the first time I ever did an install and that was the last time.
I always just do it nice & tight.
Again...springs, cup kits, coilovers....never had any issues.