Heavies were just as OP in Codex, it's just that since many things have been balanced out in Chromosome, one of the few things left that needs tweaking is the heavy. So therefore it is now feeling the heat from the community.

Now here is the thing, the lightly speced heavies are ideal for the game right now, they provide support by laying down vast amount of gunfire or AV and can absorb a bit of damage, but they are not near invincible and still need to be close to you to do significant damage. However the highly speced heavies are essentially walking tanks that can basically OHK you with a HMG if within medium range, and damage you about as much as an AR can at above medium ranges. They also need some serious firepower and commitment to take out, which is usually always impractical given that there are other players in the game.

If the maps were huge this wouldn't be too big a deal, but these maps are way too small to give such firepower at the range it has with such a strong character.

The fact here is, heavies that are well speced are the new Codex dropships of Chromosome.

So I guess assault players can't carry an SMG and Swarm Launcher? :)

Though personally I'd pick scramble pistols and swarm launchers if I wanted to prove a point.