I agree, it was a great ending. You have to remember that the majority of the people have to “see” the ending. They can’t leave it up to their imagination.
An old school "Hitchcock" twist.
I don’t watch TV to leave something to my imagination. I watch it to follow a story and at least see that story end with at least a little bit of closure. After 8 years you would expect to see some sense of finality in a final episode.
This was nothing more than David Chase saying **** you to the millions of fans who have invested their time and interest into making him and his creation a household name. It’s not ‘genius’ to leave things to the imagination, it’s a cop out.