The project I'm currently working on will be my last SpriteKit project. With about 14k lines of code I can't afford to switch to another library so I'm stuck for now. I'll never make the same mistake again and rely on this framework though.
I had also started sketching out other projects with SpriteKit but will abandon all of them and rebuild with other tools.
With all the problems SpriteKit has in iOS 9 and Apple's lack of communication about the issue, have you decided to abandon the framework as well?