Aris:
AC by default simulates a nirvana optimum grip. This is good as theoretically this grip can be achieved... but probably never will be. Also it is good for mass market and helps the new comers to have a less hard impact with simracing world. That's also why we put the semislicks tires as default choice. Good for new comers means more sales and more sales means more licenses which is a good thing for everybody.
Hardcore simracers should know better and use the proper tyres, the proper circuit grip, the proper ambient temp and so on. It's not that hard to do and should give them more satisfaction. But as usual, we always get complains from "hardcore simmers" for too much grip or whatever... it is a bit strange how one can called himself hardcore but spent no time to investigate and find the proper setting. Anyway, sorry for the rant, I do understand that everybody sees things in a different perspective and everybody has a valid point.
In the particular case of the nurburgring, here are some things to remember. It's cold and humid. Even at the summer. When I crashed my M3 some years ago (where you can see the ARIS KURVE as my friends actually draw that graffiti on the track for real LOL), it was mid august... I was time attacking and rain started heavily with "rivers" crossing the road. I aquaplaned at 170kmh... **** happens.
So yeah
for the ring I would put the track to slow maybe and certainly keep the ambient temperature always under 15°C
Have fun