From what I can tell, Graphene OS will be unaffected. Some of the app stores like Aurora and F-Droid may run into problems during the verification process. Best I can tell (and read from other sources) is an inconvenient 24 hour wait period and many have said the Graphene team will overcome that in short order.

I would say keep the faith as I'm in the same boat and have made my choice for privacy and control. Giving up everything when it could very well be a minor setback is worth holding the line.