We need to let MS know in a more effective way than by commenting on a blog post. I hope that everyone who is subscribed to this thread calls a MS support engineer and asks to be walked through re-enabling Clutter. Even if you know how to do it - call in anyway, act stupid if you have to.
MS has been known to reverse bad decisions, but the message won't get through unless it filters up from their support staff. So please, call in and ask them to help you turn Clutter back on. The phone number in North America is either 1-800-865-9408 or 1-800-636-7914. I think the second number is better.