This is going to seem crazy to those that primarily play heavy assault, but imo it seems to be that like 85% of the people playing play heavy assault. Having the missile launcher and hmg and shield and pistol seems a pretty good bit op to me.
I was thinking about it and the best thing to do imo is to make the missile launcher a primary weapon, that way you have a choice to run with a machine gun or a missile launcher and a pistol. It makes it a little easier for tanks/vehicles in general since not everyone would be carrying a missile launcher but doesn't really change a whole lot about the class.
I realize i'm going to get flamed alot for this post from the heavy assault addicts but I really do think its a good idea.