Auto add references when put in certain folders?

[Joel]

Like loading while the scene is opening and saving while I quit the game will prevent a 'full' save?

I've never heard of this happening under normal circumstances an this is generally the most common time people save (i.e. Awake/Start and OnApplicationQuit/Pause). The only situation I could see this being a problem is if you're calling Easy Save asynchronously (or an asset in your project is causing it to be called asynchronously), in which case Unity won't guarantee that the thread will finish before the application quits.

What if someone quits right as it's entering a new scene and the save doesn't 'complete'?

Unity will still handle this gracefully as long as you're not using threads. When not using threads, Easy Save is called synchronously so won't be interrupted unless the application crashes.

All the best,
Joel