Four wheel drive is not a gimmick when you have 1000 horsepower. Porsche 918 may not have the "one to one" power ratio of a One:1, but it is bound to be more stable and confidence-inspiring due to all wheel drive system.
I hope Koenigsegg don't give up on the Nurburgring record. I've been very critical of them in the past and probably will be in future, until they finally deliver some results on the track.
If Nurburgring is deemed too risky for a 1360 horsepower time-attack, there are plenty of other tracks with multitude of production car lap times. Some, like Hockenheim, have more production car laptimes than the Nurburgring, and huge run-off areas keep the risk of having expensive crashes to minimum.