I finally gave in and watched this on Netflix. I'm not a huge animation fan, but I was looking for something to watch and heard this was good. I knew some about it since it came out a while ago but honestly wasn't that spoiled.
Anyhow, I generally did like it. However, I would have not had the pig, the Japanese girl (sorry I don't recall her name) and the detective guy in it. As they had no character development and took up time that could have been given to the other characters. I would have kept it as just the three of them and would have explained that Gwen and Peter B were near the reactor when it went off, which is why they were randomly sucked in to the prime demention not because they are "spider people", as that makes no sense. Then I would have a week take place between the "event" and them trying to get home. As this would explain the week that Gwen had, which wasn't explained in the movie. The one thing I don't get, is so she just walked into Miles class and nobody questioned it? Miles was late, and the teacher knew who he was, so clearly she knows her class. Then Gwen didn't ask him about anything or help him, when it was clear that he literally just got his powers. Unless I missed something, this is the same "Gwen" right. Since her hair was messed up, I just assumed it was.
Anyhow, I get why people like this movie, the animation was really well done and deserved the praise it got. But some improvement on the story would have helped it. Overall a fun watch, but not as good as an MCU movie to be honest.