I have two fairly-novice level friends who are users of MC12 (paid, happy customers, and a third coming soon) who have both expressed confusion over the new Auto-Shuffle feature, because clicking on the Shuffle button doesn't "seem" to do anything. (Exact reaction is "the shuffle button is broken".)
My wife doesn't like it much either, and I'm too mildly irritated by it.
I think the solution is extremely simple, though... Change the artwork for the button to reflect the third state of the button. I made a simple suggestion earlier to simply add a shaded "A" behind the crossed arrows to represent the Auto Shuffle feature.
Then the complaint would turn to a question... "What's this new feature?" Once the question is that, I think they'll be pleased with the answer.
I figured since the feature was new, I'd let it go for a bit. But.. it's getting on now, I suppose...