You guys blow this way out of proportion, It is ridiculous to assume that every 9 seconds a smash hits 5+ targets for 50% of their HP.
It happens rarely and if it does happen it certainly does not take away 50% of the target's HP, Most decently geared players get hit for 5 - 7k depending on armor type. Which isn't 50% of most player's HP, Except for recruit geared players, But they get hit hard by EVERY class.
The only thing they need to fix is to remove the 100% crit chance from charge, Make it 60% instead and force players to stack crit on their gear so that the surge rating isn't so high then the highest hits should be hovering below 7k.