My GTI's lumbar support was broken. So it killed my back during long trips. My STI's seats are lovely! Butt went numb just from sitting so long, my back felt fine.I leather and cloth i always thought were great.
We even did the same sort of trip in gfs mk6 tdi (same seats as cloth gti).
Topic at one point came up about how the seats were fantastic for the drive.
Maybe you just arent fat enough?
But, I went 937 miles in 11hrs 37 mins. That's 5 stops included. Not bad.