Swift – still early times?

I just started building a brand new version of an app for a freelance client and converting some of the previous app's objective-c code into swift. Mostly core data logic and server sync code. I can't tell if it's because I'm working on a 100% swift project, or using a beta release of cocoapods with swift framework support, but Xcode is crashing on me all the time. What's even stranger is that it's the Xcode *editor* that crashes, but only "temporarily". Couple that with some really strange thunderbolt display issues with Yosemite, and I have to say that Apple's QA on their software is really lacking these days. Arggghh!!