That "future" is definately not a real future.
Either in as much as it isn't "our" world, or in as much as it doesn't/hasn't/never will have been going to be happening kind of way.
Jack's father was alive (even drunk he wouldn't be stupid enough to use a dead man's prescription pad).
I very much doubt it is the past what with the "golden ticket" for the flights.
Charlie - why the hell didn't they put on the diving equipment and then good vibrations??? It had been seen that he would drown, so take the precautions. No sympathy for the daft little hobbit.
Has Kate slept with Jack at all (thinking about the pregnancy thing)?
Why didn't Rousseau die after having Alex? I don't understand why they have never taken her for tests.
Parachute woman - not to do with Penny, but not sure if she is bad, or just bad for Ben.
That's my views for the time