4. Get Rid Of Happy Hogan
Alright, alright, I get it, Happy Hogan has a lot of fans, and a lot of people like the portrayal of his character by Jon Favreau; just not me. For one, it's just too distracting given that Favreau also directed the first two films, and his comic relief asides are just too goofy for me - namely his driving the car while Black Widow changes her clothes in Iron Man 2, and then the reveal in IM3 that he is, in fact, a giant fan of Downton Abbey. In Iron Man 3 especially, Favreau felt like nothing more than a relic, a carry-over who probably should have died, and it would given the film a symbolic quality - considering that Shane Black took over as director - while providing Tony Stark with the emotional motivation he needed to succeed without killing off a truly useful character. I'm expecting to get it in the neck for this comment; come at me, fanboys!