yeah, good luck with that....Good luck out maneuvering my gun and my 7 teammates. Cover or not, my gun still fires faster than you can run - the terrain doesn't change this.
The assumptions you're making strike me as pretty bizarre. Sure, there will be places where running around won't make a lick of difference, but good light players will avoid those places, and take routes where they can run from cover to cover faster than you can notice and aim at them. You seem to be under the impression that SD is designing the light body type as target practice; why would you even play a game as unbalanced as you seem to think Brink is going to be? If the developers do their job right, and I have all faith that they will, then a good light will be just as effective as a good heavy; where you can deal and absorb lots of damage and use abilities frequently, lights will be able to avoid fire and flank your team, putting themselves in situations where they can unload half their SMG's magazine into you before you turn around. And if you know what they're up to and you are ready for them, they have distracted you from
their seven teammates, which is just as good. And imagining that your HMG is going to perforate them before they can blink, no matter what, is folly; an HMG is an inaccurate weapon best at close to medium range, so sniper rifles will be a problem. (I know sniper rifles won't be instant kills. They will still be dangerous.)
I'm not saying lights will be unhittable ninjas. I'm saying heavies
won't be invincible tanks, which is the impression one gets from reading your posts on the matter.