Re: 2016 Allroad Tyre Wear –
Sounds like misalignment - my first set did the same and I took it up with the dealership. They would not do anything to compensate for the fact that the tyres were going to need changing with quite a bit of tread left because the edges were badly worn but they did offer a free quattro wheel alignment - but only once 'new' tyres were fitted (can't do the alignment with badly worn tyres). I think I got about 16k out of them. Don't have exact numbers as I had not tracked my swap over mileages for winters <-> summers until recently.
I do a lot of driving on rural roads and do use the available power. I definitely think mine wears rears faster than fronts (so I rotate every time I do the swap from summers<-> winters).
A6 allroad BiTdi (MY14, July 2013 - DAB & power tailgate). Glacier white, tech pack (HDD Nav, colour DIS, Parking Plus), sports seats, 4 zone climate, heated seats front and rear, ambient lighting, 75L fuel tank, adaptive Bi Xenon headlights