I'm fine with the change that you need a kill for the energy in pvp, but it would really break a lot of cool builds in pve. I mean there are already exotics, that have unique effects in pve and pvp seperately (like OATHKEEPER - the damage buff only works in pve). So bungie not being able to seperate that shouldn't be the reason to make that change pvp only. I hope it stays as it is in pve.