TASM's problems were partially to do with the editing yes. The writing is the other huge neg the movie had going against it. They should have been more worried about making a good movie than laying down a mediocre foundation for future films.
Fun fact: Avengers was the highest rated superhero movie last year by far.
The script had already been written before any of the major crew signed up though, considering we have new script writers, and that TASM was a fincial success, Webb is likely to have more room, and the writers as well, to be more creative. Considering that the origin story is out of the way, that leaves more time for villain character development and other aspects. Plus, typically with sequels things are amped up, and Webb has more experience now than when he started and the villian in the movie has a lot more potential to be visually interesting than the prior villian, and make for interesting combat scenerios. Hell, Electro walking down the street could be cool. Lights flicker on and off, and when he really powers up he could cause things around him to short circuit, maybe even make cars explode by just walking by them. Add also the color of his lightning, which seems like it'll be blue, and he'll be a character that visually stands out, and a villain we havent seen before in a SM movie (we havent seen a villian with projectile powers). Simply having relativly obscure things like Ravencroft shows that there's going to be a lot of Spidey loire in this, down to the look of the new costume, this appears to be shapping up to be the "defintive Spider-Man adaptation". The script has been praised in almost every interview referring to this movie (something that didn't happen with the last movie), and I think everyone will be on their A-game when it comes to this movie, I'm sure Webb knows about the critism directed towards the first one, so he's likely to want to go all out on the sequel and try to make up for anyone's doubts about him holding control of the character. Also, new writers means new dynamics, the script has been polished twice (rough draft from Vanderbilt, then the team writers, then the writer from Fringe), I think all the establishment and groundwork will pay off in this one.
