You like a good moan don't you - but it does make for entertaining reading
Having owned TT's for 6 years I have rarely heard of TT owners complaining about the seats to the degree that you suggest.
How long did you own your more expensive TTRS for out of interest ... we never did see a picture of it - any chance of posting a photo as the TTRS are really great cars with a superb engine.
The TT's do not have adjustable thigh bolsters as the seat bases are already extended in length, so this should compensate.
The A3's and S3's have adjustable seat bases for extra length but they have no upwards adjustment - just forwards & backwards and the super sports seats are the same.
So sounds like you may be out of luck.
The Super Sport Seat bases are identical to the regular S3 seat bases ... so you you may have to re-think buying an S3 as you mention if the seats are a deal breaker - and reason you got shut of your TTRS.
Agreed with this, just checked my SSS and they only adjust in length...
I did think however that you were originally enquiring about the support for the outer thigh area rather than underneath, that's what I meant by poor in comparison to the 8P buckets, they don't hold your legs into place away from the centre console grab handles etc...