Sadly, I've concluded that downgrading is not a viable option. Oh, it may solve today's problems, but eventually I know I will be forced to capitulate at some point.
Right now, the "Apple ecosystem" ties my family together. Two iMacs, a Macbook, two iPhones and an iPad all share a common calendar and address book. Pulling that off is much harder than it ought to be. I've struggled with that for years. It just works in Apple-land. OK, so for right now, the Apple ecosystem provides a compelling benefit for me and my family.
However, this ain't rocket science. Right now, it's convenient to not fight the pull of the Borg collective. Eventually, somone (probably Google) will figure out how to offer a competing ecosystem. At that point I will make a change.
I no longer have confidence in Apple's judgment. They have become a sales-driven company (read what Jobs had to say about sales-driven vs. technology-driven companies in his biography). Apple has not released a paradigm-changing product in years. I now no longer believe they have the brain power to do so. The Emperor is buck naked.
I do not foresee ever buying another Apple product. I will tolerate iTunes 11 for now. But I will certainly vote with my feet the next time I make a technology purchase.
My .02. YMMV.