I would like to see a few changes on the marketplace. For example, when viewing Themes for sale, i have no idea how many there are per category or in total. What i see are themes appearing at base as i scroll down; very ubercool, but it gives me no idea of how many more themes will appear. Why not have a 'good ol' paginated function. Then one can see 1, 2, 3..2033 etc. Gives visual point of reference.
I understand the reason why theme download figures are not given. But what about a top bar that randomly pulls themes in every 7 seconds or so. Or an alternative grid with thumbnails maybe 100px square that one can scroll down and get a good overview.
Apart from that, C5 is a cool dude!