I think having Peter break his promise to Gwens father...i think it'll play into the sequel and third movie in a big way. He'll continue seeing her in the next one and because he's young and still isn't QUITE taking responsibility full on..it'll be a big mistake on his part. I think because he didnt honour Captain Stacys wishes, she'll get killed by Norman and it'll be his own fault.
We'll probably see him in a dark place at the end of TAMS2 as well as the third movie because he'll feel extremely guilty. And that's when you'll see the completely true Spider-Man from the comics, when he overcomes all of that. We may only get to see that towards the end of this trilogy, but i think that's the point of the trilogy that Webb is doing. There's more to tell with the parents as well.
So i dont think u were supposed to feel 100 percent satisfied by the end of this movie. Maybe there should be a sort-of "empty" feeling when the credits hit. Because there's still a lot of questions that need to be answered, and he just started as Spider-Man. He's only 17. When a couple of years pass in Peters life (couple of movies) THAT'S the Spidey we'll all know & love.
Hopefully they'll then pass it onto a different director and we can see the young but fully developed Spider-Man operate with Mary Jane, Jameson as his boss, battling Venom, Carnage, Doc Ock, etc.