Play count and ratings in iTunes transferred to Music in 10.15

This has always worked for me and here is a test I just performed on iOS 5.0.1 (9A405) and iTunes 10.5 (141).

• make a smart playlist of songs rated higher than three stars and browse it on your iOS device
• the only bug I see is sometimes when you go to settings, the current stars don't show, but when I change the rating it is reflected in the iTunes listing almost instantly (the change pushes over WiFi back to the iTunes and causes the display to refresh after each change).
• play counts get updated at the end of the song, last played is updated correctly.

If this doesn't work for you, you may have to isolate the error in your setup. I would start with a new user account and moving 5 songs to a clean iTunes library. Be sure you quit iTunes on the "main" account if you use fast user switching - home sharing might not handle two copies of iTunes running on the same computer well. Another quick check might be to disable any firewall software on your mac. Something is off on your setup and without more testing, it's hard to guess exactly what.

The new iTunes 11 Mini Player has the option to view and change the ratings. In the Mini Player, hover over the player to show the controls instead of the title of the currently playing song. Then click the small arrow pointing to the right - not the forward control, but the one on the left of the player, next to the album artwork. It will open a menu, where the top entry is the current rating, allowing you to both view and change the rating. Exactly what I was looking for.