First, I'm thrilled that I can now have more than one instance of SE open without having to muck around with configs.   I had resorted to just including other not necessarily related projects in the workspace so that I could cross reference without contention.  I'm looking forward to getting back to more truer project oriented work spaces.
What I would like to see is the ability to launch a second instance from within SE, itself.    This would be particularly useful from the Project Menu.   Although that is a tad bit more difficult, at least a new button from the Organize All Workspaces Dialogue to open a Workspace in a new instance would be nice.
For my workflow, this would allow better cross referencing (looking at other product builds compared to the one I'm working on) and product/project interruption management that happens throughout the day.
I'm looking forward to using this new feature more.