1. The dialog sounds really awful. Way lower even than usual Marvel standards. MCU scripts usually range from "quippy" to "bland" to "really good dialog" it's usually some mix of the above, which combines to make an acceptable product. Virtually every line I heard sounds like I've heard it a dozen times before. "I gotta do this on my own!" "My friends are up there!" That line was the worst of the trailer to me, it felt very like "I'm a character the audience has no reason to care about and the protagonist likely has very little reason to care about trying to raise tension by telling him people neither he nor the audience cares about at all are in peril" It's the delivery more than the line itself, it just sounds terrible.
All the established, good actors are handling the dialog great, but all the younger actors sound like shit. Actually, the fat kid doesn't *sound* like shit, he just looks like it. They seriously couldn't have found a cute, fat Asian kid?
2. Vulture's just a guy in a tech suit. I guess they didn't learn their lesson with Green Goblin, New Goblin, Rhino, Electro and the third Goblin. If your audience will believe that being bitten by a spider can give a guy super strength and pre-cognition, a guy who drains health and vitality into his suit and a guy in a rhinoskin suit aren't much of a stretch. There was also no reason at all to make Shocker black, and I don't like the idea that he got his powers from The Tinkerer. I really liked Schulz on a number of levels. I really like the idea that he came up with one good concept, and then went no where with it and stuck to petty crime. He came up with a really powerful tech suit in prison, and instead of selling the design or becoming a super hero he uses to rob jewelry stores and sometimes banks -if he has help. He knows his station in life and doesn't begrudge it, but he's an extremely professional, capable hired goon. He's like the kind of guy who invents a new metal alloy that could have all sorts of energy or military applications and instead uses it to sell cookware in infomercials.
3. I don't like Tomei as May. I don't even find her attractive, her figure's shit. I don't care about Peter romancing a pair of darkies so long as neither of them is MJ. Still pissed about Flash being the fucking bellhop from The Grand Budapest Hotel.
4. Another "establish a status quo at the start of the film only to destroy it by the end of the film creating a pointless cycle" plot. Tony has suit, Tony loses suit, Tony didn't need the suit all along, Tony creates more suits, Tony destroys all his suits, Tony creates automated suits, Tony destroys all automated suits, Cap has shield, Cap gives up shield, Shield has helicarrier, Shield loses helicarrier, Shield loses Shield itself, Thor has hammer, Thor loses hammer, I could do this for hours.
This has become the real pattern of their movies.