Following some recent hints at what Bungie had in store for Destiny 2's grenades and melee abilities, it has released patch notes for update 3.4.0--and they bring with them a more detailed rundown on how exactly grenades, in particular, have been changed. Most of these changes reduce damage in player vs. player modes and increase damage in player vs. environment modes.
In PvP modes, the Warlock Contraverse Hold Exotic gauntlet's grenade energy gain is reduced by 50%, and the Hunter Exotic
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