Honestly, I found this the weakest of the season closers. "But, they exploded a nuke! And there was Jacob craziness!" Yeah, well...
OK, first of all, yeah, I liked the Jacob stuff. The opening scene of the finale, with Jacob and Black Tunic Dude, were great. I also enjoyed the scenes of Jacob intersecting with the main characters' earlier lives, though I would have edited it together differently, making it more of a rapidly unfolding montage. (If the whole season were a 2-hour film, that's how it would have happened, and it would have looked awesome. Sigh.)
WRT the nuke: O RLY? So the final scene is Juliet banging on it with the rock, and then there is a rumble and the screen goes white. Title card, credits. So one of two things just happened:
(a) Yes, she really did set off the bomb. In which case she accomplished the goal that several characters had been trying to achieve for the last several acts, to an obvious outcome. Which feels like a let-down, to me.
(b) She didn't set off the bomb. Maybe something else blew up; maybe the thing wasn't actually a bomb at all. (Lots of things in LOST cause the television screen to turn white, if you hadn't noticed.) It's useless to speculate now, but it would certainly be cliffhanger-standard to pull this one out at the start of the next season, and honestly it's what I'm expecting to happen.
Either way, we-the-viewers get nothing, not even a tease, to lead us into the next season. The strongest part of all four prior finales was the hook offered by the final scene, and this episode hands us a brick wall. I guess I can respect them wanting to try something different here, but as far as I'm concerned they just took all the air out. I basically feel like nothing at all happened, and I'm wondering if you and I even watched the same show, o you-who-were-so-excited-about-this.
This doesn't make me want to watch the next season. It does makes me angry and feel like a chump for letting myself get strung along. I feel like I do after finishing a big-budget single-player 20-hour video game that wasn't really much fun towards the end, but which I kept playing out of momentum.
I will admit I did find the meat of this season at least mildly entertaining. I did like how all the conflicts were character-driven, versus the the show ratcheting up the drama by introducing yet another fire-breathing ghost or whatever. (Jacob's appearance is the culmination of a long thread, so he gets a pass.)
Uh, though I really started to loathe the finale upon Jack's line about being too scared to hit on Kate or whatever the hell. I despise Jack. He hasn't learned a damn thing, and the show continues to treat him like he's its sympathetic center.
I thought that the Others' lack of emotional response to the Losties' mowing down untold numbers their comrades during the first three seasons was significant, and was hoping that maybe they'd be explained as Phil Dick-style androids. I was honestly fascinated by this and couldn't wait to see what they'd do with it.
Now I'm pretty sure it was just due to bad directing.
The Lost casual game: the player controls an armed character in the jungle. Every so often, the tall green plants rustle: oh no, danger! Use the mouse to aim your crosshairs! When you do, one of your character's friends pops out. Whew, what a scare!
If you accidentally click the mouse while aiming, there is a gunshot! Oh no! And then you realize that you're the one who's been shot, by an offscreen assailant. The game ends, after a brief epilogue where your character regrets their failed relationship with their father.