Objective - » What are important for the Season Finale? The best Tension and The Best drama possible to be delivered. This is what people can remember later and rate it an 10. All the players are in their position.
Flashbacks -» Well, here I am Lost, waiting for the second part, because all this presentation seems very strange, if this is Jack flashback, then he is not acting like himself. The writers are hiding something (waiting for the second part).
Event on The Island -» The action was awesome. Things get more complicated when Ben Know about everything about Jack Plan.
Charlie and Desmond -» Charlie situation gets more complicated and interesting.
1 - Plot Holes: Gold. Nothing that I could Notice.
2 - Time and Scenes Management: Gold. Because of the tension, You can´t notice that there are scenes that just are there to buy time, ok, maybe Jack Supposed 3 flashbacks scenes.
3 - Surprises/Twist/Shocks/Cliffhangers: Gold. The ending will blow you mind. There are some twists too.
4 - Action: Gold. This is a War, expect deaths and many shots and explosions.
5 - Funny: Gold. Rose comments.
6 - Drama: Gold. Maybe the goodbye between Jin and Sun. Hugo and Sawyer interaction. What Jack said to Kate. What Locke tried to do to himself.
7 - Tension/Suspense: Gold. Exactly what you can Expected from the Season Finale of Lost. You want to Know who will die in This War, and there are deaths, From which side?
8 - Excitement Level (curiosity/Mystery/Doubt/Revelations: Gold. The supposed Jack Flashback provide so many doubts. You want to Know the result of this War. Even Charlie deserves you concern.
This is the Season Finale part 1, so as all Lost Fans can expect, only Jack Strange Flashbacks is not exciting, however they don´t interfere with the experience that this episode offers.