One very annoying thing, that would be easily solvable via a software update, is volume normalization among audio sources!
I usually switch between radio stations and the same stations provided via TuneIn (other cars do it automatically), due to tunnels or other signal interruptions. I have always to adjust the volume back and forth.
Another convinent addition would be the ETA during navigation provided also in the left side of the screen: I usually leave the media panel open, especially when I need the navigation only for traffic information purposes.