[quote=HazmatMedic]
The Brute is wearing what I would have called "Plate armour" Very rigid-looking, bulky and almost entirely full body.
[/quote]

I'm going to assume that's the first image you posted, so I'm going off that assumption. Really the only thing I see that could obstruct mobility is those big shoulder pads, and that looks (at least to me) like something you would never wear in battle. It looks more like the pauldrons of tournament armour. Other than that, there's nothing really to obstruct his movement. The fact that it's full-body actually helps movement; the weight is spread out over the entire body rather than concentrated on one area, so it feels like you're wearing less.

EDIT: Okay, that helmet could be an issue too, but I've never seen a real helmet that looked like that outside of tournament armour.