I loved the episode, although to be fair I'm a total GOT fanboy over here. This episode was setting up the chess board. It had a lot of great callbacks to the first episode and other moments from seasons 1-7. I re-watched the whole series over the course of the last year and half since season 7 and caught up right before the premier on Sunday. That might have made it more epic for me.
Predictions (OBV SPOILERS + SOME behind-the-scenes INFO VIA Entertainment Weekly but no Leaks) : Dany reluctantly bends the knee to Jon even though neither of them want that. That ensures a loyal following from all the northern lords. They "defeat" the army of the dead but in order to do so have to make a sacrifice: Jon sacrifices himself to save everyone by replacing the Night King (who cannot be defeated, only replaced, that's why they are obsessed with cyclical imagery). He goes up to The Lands of Always Winter for the next 10,000 years. Sad Dany and co. travel down to Kings Landing and fight Cercei the final boss. Dany has Jon's child and said child is the heir to the throne.
For the record I really hope I'm wrong. I would love for Dany and Jon to rule together but I'm not so sure that will happen.