I would be willing to bet the livery is interim, almost final with more touches to go. Rumours are they are waiting on a sponsor, I think that might have some truth.
Notice as well that the car is very dark in the most interesting areas? I think they are being a bit coy. The rear is VASTLY slimmed down from last year, looks like an entirely new concept.
Some are speculating that the mushroom suspension has been turned 90 degrees to create a kind of lower beam wing, it is hard to see though. Roll on testing!
Edit: RE the nose, a high nose is not the only solution, remember McLaren used to win with a low nose. The regs are trying to force low noses so rather than crying to coble together a solution that pretends to be a high nose would it not make more sense to design the car around a low nose concept?