I think Enhanced Premium Audio is the new freebie as long as you order Premium Audio. My previous car had it added and my new Production order has it on the build sheet as well!
Never had AS on the 2010 but did have Adaptive Drive, I was the only one who used it as the missus found the ride too stiff especially on the 20's. Don't think I'll miss it on this new one as I've thrown around another 50i and I can tell a slight difference on cornering but not too much! I think its probably a driver compensation aid at the end of the day.
2013 X6 50i with Luxury seating, HUD, Premium Package, Premium Sound, Cold Weather Package, Space Saver Spare,3 seats, BMW Apps.
Former "10 X6 35i, Space Grey, Cold Weather, Sport Package with 20",Sport Activity Package, Premium, Comfort Seats, Technology Package. (Buyback)
Former '04 X5 4.4i,
Former '03 X5 3.0 (Stolen)
Former '01 X5 3.0 (Lemoned)
Former 1998 Range Rover 4.6HSE
Former 1995 Isuzu Trooper LS 3.0