There's definitely been some cost cutting in some areas of the car. For instance, the GTI had a flocked (velvet) lined glove box whereas the Tiguan's is hard plastic. The A-Pillars on the GTI were soft touch materials whereas on the Tiguan they are not. Finally, the vanity mirror lights on the Tiguan now look super cheap white plastic jobbies and nowhere near as nice as on the GTI.
We had a Tiguan in London for a while as it was good for the bad roads and dozen speed humps (I'm not kidding) that we had to go over to get on to the main roads. One false move in the GTI (MKVI) and you'd scrape.
Does yours have a gas strut on the bonnet? That was something ours didn't have and my wife couldn't lift the bonnet because she travels closer to the ground and with a lower leverage point, she couldn't latch it. The Tiguan cost more than the MKVI Golf that preceded it yet illogically didn't have the gas strut!