Wel I have always been a fan of Smoke of editing. I tend to use multiple folders and use the thumbnail view to edit with. I don't use src/rec and just toggle between the single viewers and the thumbnail views. Since you have always s been able to scrub clips and mark I/O in thumbnails, it make sit easy to pick shots and find clips. The source viewer seems unnecessary. So therefore, the single UI works. The UI is design and always has been for single monitor and now that you have 27" and 30" monitors, do you really need 2? Other NLEs are designed for 2 and it shows.
Senior Editor - Autodesk Smoke
WTHR-TV Indianapolis,IN, USA