#2- Heavies will be abused. Think about it, an entire team of heavies with chain guns & GL's........urgh.
Hopefully this is not the case, as I'd hate for Brink to suffer this fate!
If I'm mislead & mistaken anywhere in my diagnosis, please tell me.
#1 As said ARs are the "Top" of the class arsenal. Reasons they have the ability to be used in all areas of combat. This being said, doesn't make anyone who uses them invincible. They are just more versatile.
#2 Health beats speed any day. Most people like to lead the pack through the frontlines then run around them.
This won't have no effect on the actual gameplay. Some will realize they offer nothing to the team with the style they using. Well find out on "Game Day" right?!