I don't think it's gone far enough in one respect. The technology of the armor has not kept up with modern times. Let's be honest, Kaminski was really the last writer who put any kind of significant upgrade into the suit. For all the talk of the power of the extremis armor, the only actual improvements were the propulsion, full form repulsor and tapping nuke factories. Other than that, it actually displayed lesser abilities than past armors.
Not only is a writer needed that understands the character, but it needs one that understands technology. At one point, Iron Man displayed technology we could only dream of. Now in the real world we're creating technology that you wonder how it hasn't been incorporated into a "cutting edge" armor yet.
Here are two links to Cracked.com (again, satire and some foul language), but both articles display technologies that a writer should be borrowing, or at least coming up with similar concepts, to use. http://www.cracked.com/article_17476_7-man-made-substances-that-laugh-in-face-physics.htmlhttp://www.cracked.com/article/212_5-materials-that-will-make-world-as-we-know-it-obsolete_p2/?wa_user1=2&wa_user2=Science&wa_user3=article&wa_user4=recommended
I understand that, if used wrong, he can definitely be pulling things out his rear to solve problems, but again, a good writer can avoid that. With all the things at his disposal he should be one of the most versatile, and the fact he relies on his brains more than brawn should reflect as much. It's one thing to have a can of shark repellent in your belt, it's another when you have a smoke grenade, retardant foam and combine the two to scare a shark away, making a weapon on the fly. That latter part is what Stark is about, not just "oh yeah, got a fix for that in my left pocket."