This. It's just like when Iron Man stood up to Thor. They've made everyone somewhat vulnerable, and that's a good thing. I actually thought it was nice seeing Hulk get taken down in a way that still showed, despite all the preparation and resources, and even having Banner help, Tony could just barely defeat him. I didn't feel like it weakened the Hulk, but it did set some limits on his power.
Some people argued "what's the point of the Hulk now if Iron Man can just do what he does!"--lol, but I think people have been gaming too long who say that shit. It isn't like the Avengers have a raid cap..Hulk+Iron Man>>>>Either of them alone. Also, it isn't like Iron Man can just whip Hulk's ass whenever, as they carefully showed, dude need a lot of prep, and still almost got shit on. Which shows if you dump Tony into a rough fight out of no where, he's not going to be able to do what Hulk does. So I actually liked the Hulk fight.