They've had little to no changes since the release of D2 and is one of (if not the worst) grenade in the game right now. There is no reason that a grenade is only useful on a single subtree (top tree nova) and with a charge time. The damage needs to be increased significantly in pve and its consistency needs to be increased in pvp. I cant tell you how many times I've thrown the grenade and it just bounces in place for 2 to 3 seconds before actually exploding. Add that to the fact that it struggles to kill guardians at half health and minor trash mobs smh. It's been weak for way too long. (Ps: please just fix the grenade and not just release an exotic to make it usable.)