Just saw the movie over the weekend, and really liked it. I knew the spoiler about the ending from here and elsewhere; it didn’t spoil the movie, and it fit the story well.
Some random thoughts:
The Cuban segment seemed like a brief callback to the less-serious Bond of prior decades, not that there’s been no humor in the Craig movies. Eyeballs (especially Blofeld addressing his birthday party remotely by eyeball & nobody at MI6 realizing he was taking meetings when he was talking to himself in his cell), “Spectre bunga-bunga,” Ana DeArmas’s character, and Bond’s escape with the scientist from 007 and the Cuban police, were comic and at points slapstick.
How did Safin not realize Bond was about to pull something when he abjectly kowtowed in (false) apology?! He didn’t demand or even ask Bond to do so, it was totally “over the top,” and I was sure from the first moment that Bond was only taking that stance to draw a weapon or gadget, which of course he did.
How the hell did M not lose his job considering how much he royally screwed up by resting so much of his already ethically problematic* Heracles plan on a dodgy turncoat scientist? He kept putting off calling the Prime Minister until it was absolutely necessary at least in part because he knew he’d get into some serious shit for his screwup, which oddly enough he didn’t (at least on-screen). He also had to keep putting off the Japanese and Russians at a key moment, which meant putting off firing on the island until almost the last minute, at least partially because he couldn’t admit the full depth of the situation. To be fair, Bond rightfully didn’t want him to mention Heracles so that nobody else knew it existed. But IMHO M could’ve said something more if he personally had nothing to hide. When he said “let’s get back to work” after toasting Bond near the end of the movie, I was thinking “maybe not you” but again he suffered no consequences on-screen.
Speaking of Heracles, it bears a considerable resemblance to Project Insight from the Marvel movies. The head of a spy agency secretly develops a weapon to very selectively and remotely kill only the desired targets, irresistibly like a bolt from the blue and essentially without collateral damage. However, the biggest enemy and target of that spy agency steals the secret weapon to hijack it for its own purposes, and instead it will be used to impose a dictatorship by rapidly, remotely, and irresistibly decapitating any resistance.
*Not just the whole extrajudicial playing-God thing, as that’s inherent in the 00 business, but (1) it can’t be recalled once targeted, as the nanobots will be out in the world essentially forever, (2) it’s utterly unstoppable if it falls into the wrong hands, and pure chaos if it falls into more than one set of wrong hands, and (3) it killed family members of the target as well as the target him/herself. (2) is sorta one of the points of the movie; the fact that M couldn’t let the Russians or Japanese know about it illustrates that the prospect of someone – actually, pretty much anyone – else having Heracles is infinitely larger a problem than the ability to kill reliably and remotely is worth.