I have a release awaiting review.
I got a watch through the lottery Apple ran (thanks).
I want to install 2 and start doing the new version, but if I have to duplicate things on the existing version I would be screwed.
What are other people planning? I guess if the flashing process is quick I could just reinstall the OS each time.
You can still build a test your app on 2 and then submit using Xcode 6. I run beta iOS updates and then build production apps with the old Xcode - you don't need a device plugged in to do this. However you're risking missing bugs as your test OS doesn't match your build OS. As for switching between watchOS 1 and 2 - downgrades are not supported or reccomended.