I think you all know where this is going.
These grenades are useless, even with Shinobu's Vow.
No Titan or Warlock is using these. No Hunter will even try them without Shinobu's.
Even with the exotic, they no longer do enough damage nor do they regenerate enough energy to be worthwhile.
I'm not saying they need to completely revert the nerf because they'd be OP with jolt and such. But they do need some help. They should be a viable option on their own and should be good if you're using a dedicated exotic for them.
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There's a build but it's only for stunning champions and my opinion I would rather use a gun than an ability. Skip needs something done to help it or storm grenade will be the best grenade to use both pvp and pve.