My quick and random thoughts...
I'm wondering what was on the material in Jacobs tomb.
Locke died twice off the island. Not sure how he fell out the window.
I love the way Locke questioned Ben on the beach. A total turn around in character. Ben had to kill Jacob, not Locke 2.0.
Whats in the guitar case?
Dr Chang seems to be very receptive of the idea of the people from the future.
I think the series will end when the plane lands and the people just get off the plane. Jack and Sawyer will both make googly eyes with Kate.