It's no different than something like Iron Man's default. The Initiative costume is just made to be simple in design.
Not that it matters anyway.
The GOAT War Machine costume is coming too.
Oh wait the Initiative one is the same one as the later series? The one that is based on Stanetech?
If that is the case that honestly just makes me even more disappointed with the version in MH.
I am probably just being picky as I doubt it will be THAT noticeable in game, but I just think the armor looks kinda flimsy. Maybe the one they are using on the store is just a bad pic, but the texture work looks way too plastic-y and as Anoregon mentioned he looks extremely top heavy.
The MH one seriously looks like he is wearing a tight fitting bodysuit anywhere from the chest down. That obviously isn't rare in Iron Man armors (and the first iteration of War Machine features that style) but that specific armor should look bulkier overall IMO. The chrome parts also have a pretty shitty texture that don't have much shine, which is kinda WM's staple y'know?
I will just hope it looks okay from the normal game perspective I guess, but I do think they could have done a lot better job.
Anyway, I will reserve final judgement until I see it in game and stop my nit-picking.
Might actually re-install the test center tomorrow to check it out.