I feel like the lede was buried here, or I missed something.
As I recall in the first Destiny, legendary weapons were assigned random sights and weapon perks, while obviously limited to to a certain set based on weapon type.
I was watching youtuber Datto's comparison video between Better Devils and The Old Fashioned, and when he was described the perks, as though they were forgone conclusions, I furrowed my brow.
Did they mentioned this is pre-release, and I missed it?
I suppose I shouldn't be surprised, as with each expansion they've refined the perks that weapons get. I can also see this being a 'Fairness and Balance' change, as you see the weapon in PVP, you will know the exact capabilities of the weapon. I see the argument that each legendary weapon is now a hand crafted experience vs. a random chance of something between totally awesome or utter crap.
My instinctual thoughts are that it makes weapons feel incredibly less diverse. Lowering highs and raising lows.