Well said, lordofthenerds.
We are not getting too much of a difference in characters this time around; and for those that do have a bit of a larger role are enhancing their screen time to only a bit, so this will not be an overly long movie nor will it be a crammed movie. In the previous films, we have been seeing a lot of MJ and Peter; this will now be sliced in halves to feature both MJ and Gwen. They will not be both getting the same amount of screen time as MJ has been getting in the past movies; instead, MJ will get half the screen time she used to get and Gwen will get just as much as her; this will not cause any sort of shift in movie time. Harry, in the past couple of movies, has also been getting quite a bit of screen time; this will be no more, if not less than the first two. Think about it, straight from the beginning Harry finds the goblin lair, and he is soon to become the goblin; we will see perhaps more goblin than Harry, and then he will die in about the middle or three quarters through I'm assuming. He will have exactly the same amount of time as in the previous movies, which is just enough, but this time he dies, which gives us even more time. Then their is Sandman; he will be our main villain, he gets a story of getting his powers and a story of perhaps dying; we will replace him with either Green Goblin from the first or Octopus from the second; so far there is even less of movie time than the previous movies. Then we see Venom, but not too much of Venom; unlike Sandman with a beginning and end, Venom only has a beginning and a bit of a middle. This can just be fit in the place of where Harry used to be, after he dies. So we have the exact same amount of time right now as the previous movies. All we need now is the introduction of Brock and Captain Stacy. I'm not worrying about Stacy since I'm thinking he'll just be a drift away character like John Jameson in the previous movies, and Eddie is the only exception to perhaps a longer movie; but even he does not need a huge introduction, only about five to ten minutes; perhaps him getting a job and losing it, and the rest is up to Venom. The only thing we should worry about now is that pesky fourth villain, or movie in a movie storyline, which will shift my whole opinion; but for now it seems steady.
Edit: I just realized that only about two people will read my excessivly huge comment; if you make any jokes about my post being over crammed I will permanently....uh..damn I can't do anything.