Really enjoyed the finale, afterwoods on Sky they had a programme where they interviewed the writers, although they didnt reveal much at all, they did indicate that there is a definate course that the show is following. Lots more of Widmore & Linus to come

They also confirmed that the majority of wierd going ons is due to the unusually high concentration of electromagnetism on the island, but we already knew that. Also the next season will concentrate more heavily on time travel... which might tie up a few more of the thousands of loose ends this show has created.
Next season the writers intend to kill of a few (more) major characters.
****extra spoiler****
Wasnt Jin alive in that flash forward about Sun and her baby when he was running around trying to buy a teedy bear? Or was that more time travel japery?
****extra spoiler over****
Anyway I thought this seasons finale has been the best for a while, well I thought the third season lost its way altogether. This one has seemed a lot more focused with the introduction of the flash forward.