The new version of Amarok provides a lot of bugfixes and speed improvements. Besides that you will notice powermanagement options for suspend. So you now can setup that suspend is inhibited when playing back a song or you could stop a and automatically restart a song when suspending the machine.
Amarok 2.8 also provides a new audio visualization plugin aswell as the option to fadeout the current track when pressed pause or stop.
For this the fading and visualiztation features to work you need to install phonon-backend-gstreamer and set it as first backend in kde systemsettings -> multimedia -> phonon.
All in all Amarok 2.8 brings a more stable and faster user experience and is an ideal addition for Neptune.