Full scroll for songs, albums, artists...
The USB search functionality has taken a huge step backwards.
Personally, I really don't like the new media interface at all. My wife took the car yesterday, and when she got back I asked her how she liked the new software -- her first response was that it's waaayyyy too busy. I agree. Sometimes simple is good. I miss 7.x.
And I've had 15 or 20 songs just stop part way through even though they were fully buffered, and I've had a couple just not even begin to buffer (then just skip to the next) when listening to Slacker radio. These things I'm less concerned with because I know it's not just me and it's a bug Tesla will fix.