Graviton Forfeit was supposed to only be nerfed in PvP related activities per the patch notes:
“Reduced melee recharge while invisible and wearing Graviton Forfeit when in PvP activities, including Crucible and Gambit.”
But it was also nerfed in PvE, presumably by mistake:
Graviton melee regen nerfed in PvE
The first half shows the current (4.0.0.3) state of Graviton. My melee recharged a little over 50% while sitting in stealth for 14 seconds. The second half shows a clip from before this patch where my melee recharged by nearly 100% over the same period of time (Note: I also picked up one void well after the kill, but this is the clearest clip I could find pre 4.0.0.3)
Please stop nerfing hunters in PvE due to PvP. I understand that this was probably by mistake, but PvP affecting PvE is getting old.