This thread is mad, who advised you to swap all those parts just to fix a sticking pedal. Have you taken it to a garage at all Ben.
I know, I know... I'd be wonderinging the same thing, if it wasn't actually happening to me.
The story is that it was in VW for some new pads (a few months ago) and I asked them to investigate the issue with the clutch whilst they were at it.
The feedback was that it was the thrust bearing and that VW Uk wouldn't give any financial support to help fix it, even though the car had full VW serice history and was less than 4 year old. I told them to stick it up there arse.
So I got my local guy (Prosport) to sort the Bearing and clutch out.. while the box was dropped it was clear the DMF was shagged, so this was replaced too.
Problem seemed to have gone, but came back.... I took it straight back to the garage to show them the problem 'live'. It was clear that the regulator valve was squeeking and vibrating, so we changed this as it's a sealed unit, when the system was put back there was no pressure from the master cylinder, so this was also changed... and all was good, for a few days, until now.
.... and that's where I'm up to.