Well?
You have the time to nerf the Mythoclast and adjust values for Scout Rifles across the board within the same time span, but don't have the time to buff the exotics you stated you were going to adjust over a month ago? At the time when you announced the buffs, 99% of the community didn't even know the Mythoclast existed. Yet, the Mythoclast got adjusted before the other guns get their already announced buffs? Do you even logic?
There's really no excuse for it at this point.
Edit: I realize some of you think the Thorn does not need a buff, and while that's fine (I don't have it, I don't know), it's also missing the point. The real focus here is the fact that Bungie announced that they were going to buff both the Bad Juju and Thorn over a month ago, yet no changes have been made still (but changes were made to other guns during the same time frame).
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They stated they are looking at ways to make the upgrading process of exotics more interesting. It would be retarded to buff those two weapons and THEN re-release with new upgrade system hitting all exotics. Any logical free-thinking human realized when they announced a change to upgrade process on exotics understood they will likely release thorn/bad juju buffs along with that.