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Not really. As long as you do not switch lanes the AP runs very smooth like in 8.1. Lane Change Assist is still a mess. Very slow or aborts completely.
Yes, they reduced the interval (likely due to the amount of accidents). But normally that's no big deal as you should always have one hand on the steering wheel. AP is a "hands-on"-feature ;)
That's strange. I'm driving my S75D with ultra-white seats for nearly 3 month and 6000km (2700mi) and I always wear blue jeans. Up to now the seats look brand new without any dye.
Monoblock: Vossen Hybrid Forged VFS-10 Wheel - Advanced Flow Forming VFS10
Two-Piece: VWS-1 - Vossen Wheels
Unfortunately both are only available in 20".