the story is obviously very important. as are the characters that are changed from that story. but at the end of the day, it is an action movie, and i was left wanting more from the action scenes in tasm1. furthermore, webb is a character-director, with his indie sensibilities, so i am not too worried about the acting and character development in the sequel, unless the writers have truly screwed up.
an action movie with good action and nothing else is totally forgettable. like the first gi joe movie (i thought the chase in paris was very well done) for example.
for me, the sequel needs to have more thought out action sequences, especially when the cgi on spidey looks so good. otherwise it's a waste of my favourite fictional character :/