No subclass gets to have 2 grenades types at 1 time. That's why it shouldn't be a melee. Now you want to say that the smoke is a melee charge, but how many melees can hit someone from 30 feet away, behind cover? The throwing knife is the only thing similar, but you need a sightline to actually hit someone, as opposed to smoke which just needs to be in the vicinity. Envemomed smoke should have been it's own grenade, not a melee. It shouldn't be combined with a second grenade to make a combo, it should have been it's own style of grenade because the poison is effective on it's own. As for the other classes having better grenades, the Stormcaller has awful grenades for PvP, and only an average PvE grenade. Bladedancer has some pretty crappy grenades once arcbolt was nerfed, and the only decent item is skip grenades at this point. Striker titans do not have a 1 hit grenade. Lightning grenades are amazing, but it takes 2 pulses to kill a full health guardian. So this nonsense that you're using a melee charge to get 2 grenades is merely justification to not have it nerfed or changed. No other class can throw 2 types of grenades at once, at a distance for kills. A voidwalker doesn't have the ability to keep enemies inside a vortex grenade longer. Envenomed is basically a second grenade type, that other classes do not have.