I watched this episode again, closely, and there are no clues, and there is no payoff, and they just failed to come up with anything climactic, whatsoever.
In TV-talk circles, people mention "jumping the shark," in reference to how stupidly bad and unclever "Happy Days" got, as a TV show/sitcom. What David Chase (the writer AND director of this "momentous, final episode") has done is to FAIL TO JUMP THE SHARK. What a ripoff. And any of you guys who praise Chase for fucking up to this extent are little fanboys for doing so. Yes, indeed. What sorry, weak BS this is. Selah.