I actually watched it despite never seeing an episode in my entire life. I did sort of catch up via spoilers and a "greatest hits" youtube binge leading up to it so I wasn't too lost in the mess. Some other things I vaguely knew of thanks to memes and so many people talking about it in the open, so clearly I'm as much of an expert as any of you would be.
I thought it was pretty good, don't really see how else it could have ended really but I'm a casual who just wanted to find out.
Seeing the mad reactions confused me a bit, I could see why fans were upset last week but when the literal dust settled you figure this would just be an epilogue of sorts and all the time was needed to wrap it up. Sure it looked rush and glossed over some key confrontations but hey this ain't a book.
I do wonder how the story would have went if some characters had died (or stayed dead) sooner but again I'm a casual and don't want to get into debate and details of it all.
I'd probably give the episode a B, and the show overall from what I've seen of it a solid A both for having some cool moments and also for making me laugh (sometimes unintentionally).