It got weird because Fox fucked it. It was supposed to be drawn out over more seasons, but Fox decided to put it in the Friday night "death slot" causing viewership to drop, so since they weren't going to get renewed any further, they had to cram the end in so that at least the story wouldn't go unfinished.

Best ending to a series JJ has done. Has a great big picture ending. I really can't say more without ruining it for those that want to see it. But it ended when it should have. And you can't just watch the end to get it. You have to have seen almost every episode. That's what makes it so good.