Ran into the same scenario in a gambit run. Ran into an eriana's which wiped out myself and my entire team within the first few seconds of invading. My first thought was exploits (especially after it happened on the next few invasions), till I ran into it on subsequent matches. So I decided to try it myself and ran it for the remainder of the night. I can safely say that it is 100% broken as is. The gun is a one tap on any part of the body, has more ammo starting than most if not all snipers, and has range better than top tree gunslinger (the only thing it compares to in terms of feel) and obviously doesn't run out of juice like said super. So unless Bungie decided that a special ammo hand cannon should be made the superior of top tree gunslinger, Eriana's and its like are definitely broken in Gambit currently. (For reference, I was running hunter with Ophidea Spathe for all the daggers. A. not meta and B. not running anything that would help in the hand cannon damage department)