Thank you for this forum post. The forums seem to be the only way to identify features that are missing or changed from the update to iTunes 11. I have been a fan of Apple software for a long time, but the upgrade to iTunes 11 has driven me to regularly provide feedback to Apple through the "Provide iTunes Feedback" option.
I miss being able to rate songs using my iPhone. That was my favorite feature of the Remote app. They take away a useful feature like being able to rate a song, but they add odd features like being able to switch the screen of my desktop Mac to show the iTunes Visualizer while I'm in another room.
The rest of my time with iTunes 11 has been trying to sort out the deltas between the different display options when using the Songs, Albums, or Artists screens. Search results disappear when switching to a different window. Sometimes the search results persist between different View options. I'm also unclear on why we have a dropdown for View in the Playlist, but not from the Main Music window.
I keep thinking I should just downgrade back to iTunes 10, but that is painful. However, the frustration of tyring to make my peace with iTunes 11 will make downgrading worth the effort.