I am feeling your frustration, we were ready to release our app in beta. RC0-1 changed our schedule drastically since it isn’t stable enough. However I think moving to RC1 will be worth it in the end. Our startup time went from 9 to 4 seconds. Animations ran smoother, transitions worked better and tap actions look more responsive.
Currently I am waiting for a solution to develop on a physical device so I don’t have to wait 4-10 minutes compiling for each code change, see this topic.
Until then I have to wait, I am sure the Ionic team does anything in their power. 