I'm going to second Xarbrough on lots of things
Likes :
Single tab style of working is great.
Dislikes :
Switch workspace is in a weird place. I had no problems with the previous location and functionality other than I wish it was always alphabetical sort vs MRU.
Suggestion :
Seems like the top bar is being use as information only. It'd be nice if these were also buttons to change branch / workspace.
The information architect in me feel like
Workspace -> server -> project -> branch is the more logical hierarchy to present this info. But I understand this is close to the objectspec. In which case a right click copy for me to paste into cm.exe would be useful.