I am reasonably satisfied by the ending, although I have some issues:
I really wanted to see Jon Snow go full Targaryen and take over command of Drogon after Dany's death, fly down and crisp the Unsullied and Dothraki and then declare himself the rightful king of the Seven Kingdoms.
When Sansa declared that the North would be a separate kingdom (because it had been one for centuries before), I wanted to new Prince of Dorne to perk up and say "Uhh, yeah, us too. We were the only kingdom not conquered by the Targaryens, so we are going our own way also." And then all the other ones deciding they too would rather be independent.
The Wheel isn't broken. It's in fine condition. Here's what's going to happen. Bran will rule wisely and well, and all the other Houses will rebuild or consolidate their power during the peace. The Small Council will run the day to day business. When Bran dies, the Electoral College will appoint a new king. In time, either this new king or one of his successors will have a son, and will say to himself "I'd like to start a dynasty." The Small Council will scheme amongst themselves, and the high Houses will start to jockey for power and position, just as they did when Robert died. Eventually, there will be a new dynasty and we will be right back to where we were. They should have had Bran say to Sam "I like your idea about the people voting. I have this idea about a thing called Parliament I'd like to discuss with you."
Are Sansa and Tyrion still married? I'm not aware that they got a divorce, despite Sansa's second and illegal marriage to Ramsey.
Is Tyrion the Lord of Casterly Rock now?
Dorne should be the true superpower in Westeros now. Aren't they the only ones with an intact army left?
Jon Snow going back to the Night's Watch, and I guess becoming the Lord Commander again, was interesting. What is the Night's Watch role now? It was too bad they didn't show Tormund with a smoking hot Wildling woman and then turning to Jon Snow and saying "Her twin sister thinks you're cute."
I would have liked a final ending that had either a nest of dragon eggs in Volantis hatching while Drogon watched or one of Craster's sons in the far North opening his eyes and they are "Night King blue".