This gun is so useless it's not even funny.
Multi-media Tool is literally a scout rifle with advanced radar or some -blam!- and that -blam!- is arguably better than this Sniper Rifle
Nobody is just gonna stand there with this gun and wait for statistics to show up during a boss fight or during crucible. During that time you're more worried about how much damage you're going to be dealing to the boss and there are arguably better snipers that do a better job than Darci.
And it's another thing where they can't be as creative enough with this gun to tie it into its lore. If Darci is sentient as its lore suggests give it like voice lines or some -blam!-. There's no reason this Sniper Rifle should feel so generic that it's such a waste of a slot