People whining about explosive shots are always the same top players. You know, those guys who only want to rack up points real fast so they can play as a hero and become nearly invincible. They usually equip Bounty Hunter and use cheap tactics to get those points..They don't even care about game play or balance. All they want to do is run around, destroy the entire opposite team by themselves. Bullies! If there's no heavies around to push them back, they don't even have to be careful.
Heavies are supposed to be strong, hence the name. The heavy is a war machine for the front lines. He's perfect to push and destroy but he's not invincible either. It usually takes a few heavies to break through..
Anyone with a decent aim will take out a heavy pretty fast, especially with a BLURRG or NT rifle.. Better yet, a friendly heavy with a good aim will take them out fast.
I've only been playing this game for 2-3 weeks so I don't know how it was before the patch. I'm not new to shooter games though and I know when something is overpowered. The DC15 exp shot isn't that op considering all the other one-shot weapons in this game. But I think they should reduce the effective range of the explosive shots so you can't really snipe someone across the map...