This is taken from the Bungie Weekly Update, 17th of October, 2014 (The one about the Auto rifle nerfs and various other tweaks)
"According to the notes we published, our work may have resulted in either a slight increase or decrease in the deadliness of your go-to weapon. It’s a safe bet that you’re wondering why. We understand that curiosity.
Let’s talk about why we do these things. I’ve talked to a lot of our developers about the update that went live. The main theme that emerged from every conversation can be summarized like this:
[b]“There should be no single answer for how to win in Destiny.”[/b]
...
Balance is not about everyone being equal, but rather that not everybody is doing the exact same thing. If everyone is doing the same exact thing, something is not balanced. Everybody is trying to pursue the same unbalanced thing. "
I would love some discussion as opposed to salty memes and dank Thorn using dissenters.
<3
Edit: #gameofthorns
Personally, I don't think Thorn is OP. Is it a great weapon? Sure. I think everybody is using it because they hear it's OP and that means more people are getting killed by it which makes everybody think it's OP. Rinse, repeat.
Going by bungie's reasoning, the Thorn should get a nerf and ARs should get a buff. Not much of either but enough to make less people use one and more use the other.
I really don't care. I'm not real concerned about what kit other people are using. I play with what I enjoy.