First one, is to avoid to transfer to play screen when whole album added to queue. In case of tracks it works properly - stays on the tracks screen.
In case of list of albums this action transfers to play screen.
Second one, add album name in tracks lists on play screen. IMHO it is more useful information than bitrates and etc.
Third, add album cover to the widget.
Fourth one, looks like a bug. But I could not catch it. Sometimes player stops and disappeared. The correspond log information is absent.
Best regards,
Alexander