Corona Labs will strive to make sure the the Facebook library works with Facebook and allow you to submit apps to the supported stores. Facebook issues breaking changes about every 3 months and we have to adapt to them. We have zero control over what Facebook does and how you use it, is up to you. It’s your responsibility to make sure your app is compliant with their changes and we will do what we can to minimize any API calls on our side (i.e. facebook.request() not getting renamed to facebook.doSomethingDifferent() unless FB forces it on us.)
Will it have major impact? It’s hard to tell, we don’t know what you’re doing with Facebook. But they’ve changed things like me/friends only returns your friends with the app installed now, so that could be a big impact, but we can’t guess.
Rob