"Doc", I bet if you talk directly to one of the techs they'll laugh re: lifetime fluids. With your complaint of shifting - I'd suspect a fluid & filter change is in order.
Re: The ABS is a safety issue and they WILL address that - no doubt.
Re: AC - recver/drier is a common problem especially in hot climates (Cal,Texas, AZ, Fl.) Another issue that may restrict your AC is the cabin filter which is usually changed at the "Inspection II" that will restrict air flow.
Re: Window regulators - that should be no problem as far as warranty.
If you EVER have a problem w/ a dealer or BMW service dept - call BMW's customer services' Nat'l line. That sends up a red flag to BMW NA and they have a rating system for their dealers (CSI = Customer Service Index) and that reflects the dealers commitment to it's customers but also dictates the amount of warranty $$$ issued to that dealer, incentives to said dealer & discounts on new cars.