My thoughts... I think it doesn't look as bad externally as some might have suggested.
The colour is, as always, the key to making it look better - the red GTI doesn't look as good as the grey GTD in these photos.
The GTI wheels look terrible - but I always think the standard GTI ones on the Mk7 look bad anyway. The GTD ones were nicer on the Mk7 and remain so on the Mk8.
The interior... the seats look good actually. The DSG gear knob doesn't impress - a lot of dead space there. I don't like the way the inovision setup looks either and these will be the optional "navpro" version too.
So for a GTI you are looking at swapping the wheels, swapping the paint, paying extra for DSG and if you want the bells and whistles, paying for navpro too.
That might be a dealbreaker for most, especially if the base UK car is 35k to start with.... paint at 500, DSG at 2k, wheels at 1k and "navpro" probably 1.5.... thats 40k. I suspect it will be £39995 in that config.
And that more than anything else is a true worry.
The good news is that the standard GTI has effectively PP brakes and diff though....