As with any Beta, it's not wise to think of it as "stable" and expect it to work as reliably, or be as tested as an RTM version.
But, I've found the second of what I consider blocking issues with SP1 that leads me to think it's time to test the uninstallation. I independently found that enabling Code Analysis for C/C++ spits out what seems like verbose tracing information that causes Visual C++ to view building with Code Analysis turn on to fail a Build. I found that someone else had found this already and logged it on Connect: https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=218742. Breaking a major like Code Analysis for C/C++ seems a little disconcerting.
The second blocking issue is the inability to step through code running in a second thread create via an asynchronous delegate: https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=223081 Again, a reasonably fundamental feature gone.