Frankly, my money is on the Climax of the Film being Peter and Tony debating on whether or not Tony should execute Vulture on the Spot. He’s seen Peter’s Face, the Raft isn’t escape-proof, the next time it might not be a Ferry he destroys, it might be Midtown High and Tony has enough dead Teenagers on his Conscience. Even if Toomes goes straight, somebody is going to want his Engineering knowledge to make even more dangerous weapons. The world’s richest man got his mansion blown up at the end of his last movie, what chance does a kid from Queens have?
Tony: “I’m sorry kid, but this is what taking responsibility looks like.”
However, Peter manages to save Toomes, but he is disillusioned with Tony Stark and decides to sever ties with him.
Ultimately, Tony realizes that, hey, maybe that kid IS better than me.