We are working on a design with more density in mind. Until this design is solidified we are putting this item back to Under Review.
An error occurred while saving the commentSven Goossens commented
In case the emphasis for you (fellow voter) is on "compact" instead of "professional", you could try experimenting with my client-side browser patch for the web-interface: https://github.com/Sv3n/marginsqueeze
It's a relatively easy method to spin your own layout mock-ups.
This feature item is still in the works. We will keep you posted as we have new info from the feature team.