I'll just politely agree to disagree with that statement.Iron Man 2 was a pretty shitty incoherent mess of a film so I'm not sure how great of an argument that is...
I didn't see the Avengers tie-in material as a "mess".
The movie had similar beats and number of action moments.
For me the worst part of the film was drunk Iron Man and even in context of the film it makes sense. His toxicity level was 93% and he thought death was imminent so he was just letting it all hang out.
Regarding Studio interference I'm not quite yet ready to say SONY is going to hit this Spidey film out of the park. The same studio that forced Venom, was going to force a Vultress character isn't getting an instant pass from me.