Do people need every single plot detail and precious film time wasted on bland exposition and explanation when a bit of imagination and logic leaping can do the same?
When that plot detail is how the entire plot is resolved then yes that does indeed need some explanation. Instead of the 'Tony has a magic do-dad that solves the plot that worked just because' we got in the film. It's still a horrible plot device but its use is made worse by the fact that they didn't explain the whys and hows it worked. Then again the entire film worked on the 'just because' excuse so wanting anything more from it is some high expectations.
as for the shield manhunt thing, well its about what I expect from madhouse. Was it absolutely and vitally important to the films overall plot and character development? In no way. Did it lead to some freakin awesome action scenes? Oh yah. When you go to madhouse, you go there for them to animate a film for you that looks good enough to make a man drool. That was my expectation, that the plot would be there just as an excuse for the action, and lo and behold, thats what I got. Hulk Vs Wolverine isn't well thought of for its plot and deep characters is it? I expected the same, thats what I mostly got. The only time Madhouse had a story worthwhile, with a fitting beginning, middle, and end was trigun. And that project was a labor of love, done by parties at madhouse who wanted to keep a canceled comic product going, and reached out to the author. EACH and EVERYONE of their series is the same story, often a strong beginning with a lackluster ending. Maybe X-men is above their usual standards since it maintained a steady course all the way through.
"Freakin awesome action scenes" is a bit much. I've seen plenty of series and films with better action scenes so this was a yawn from me. It didn't help that the action had no weight since the plot connecting those scenes, and what is supposed to make us give a damn about them, is so terrible. I don't care about the conflict between Iron Man and SHIELD because it was stupid so whenever they fight in my mind I was going "this could be solved in 2 minutes if they weren't so stupid."
As for Madhouse and story, well since they made 'The Girl Who Leapt Through Time', 'Paprika', 'Paranoia Agent', 'Summer Wars', 'Black Lagoon', and many other good shows/movies I kind of expect more from them. At least something that isn't bland, soulless, and stupid. But that seems par for the course for their western licensed Anime.