I can defend this pretty easy actually. Theres not really any reason for there to be additional panels. The body language isn't going to change from bubble to bubble and additional paneling is unlikely to execute the story any better. Bendis also tends to make it easy on his artist from time to time. You might look at this and say fuck why is there is so many bubbles per panel? but taking it easy panel wise on artists is one way to let them consistently bring it as best they can.
That being said, that approach has been ineffective several times before but its fine here. Theres no rules when it comes to the number of bubbles per panel. Its all about the flow of conversation that should dictate panels. The tone of the dialogue is pretty consistent through out those two panels. No need for change imo
Nah, the solution is to cut out the fat and not have a ton of superfluous dialogue. The book has two entire pages devoted to an image of Stark sitting on the floor, and the only reason these have to be full page panels is because Bendis just had to include pointless asides about how Tony doesn't like tea but will have some anyway and make jokes about how he easily cracked the security panel.