What was the point of the build up of does L+R=J? We find out it really does! Then we find out he's not a bastard but that his parents were legally married and he is the true heir to the Iron Throne! Then... nothing. He goes away? For getting rid of a tyrant. What authority did Grey Worm have anyway? NONE. His queen is dead. He's on foreign soil. He and the rest of the Unsullied should have left immediately and Sansa should have told the rest of the great houses who Jon is. It's just incomplete.
But ok let's give it to someone who only "remembers" what it's like to be Brandon Stark. All of a sudden he's answering to his name now? What if he has to "go now" during an important meeting and his eyes roll up into his head? Stupid stupid stupid. Worst writing ever. If this is how Martin ends things I will be extremely pissed off.