Please take this one on the "constructive critics" side
I found the plot of SF:T quite trivial and badly developed (I mean: big scientific project to conquer the world and a confused way of narration, with some predictable twists); I know this was probably to keep the game on the "classics" side, but is SF2 going to have a deeply different plot with, who knows, more mature or original themes? I don't mean to transform the concept to something with no humor (I loved some humor scenes in SF:T, for instance the "This'll have consequences" flick) but maybe the game itself could have a different mood than SF:T.
I think the game basis is already good - I found SF:T a really enjoyable adventure game - so maybe it could be easier to concentrate on other factors like screenplay, dialogues and so on.
I'm curious to know how SF2 will figure from the story point of view
Another critics could be the little time the player could spend in each place; we visited many places but for very little time each. Will SF:2 be more accurate from this point of view, maybe with less locations but with more things to do in each area? Or with lots of locations and lots of things to do, that would obviously be perfect :P