With the latest taboo, this can be a fantastic card, in a multiplayer scenario with a well-connected place for sniping. We confirmed this in a four-player playthrough of Return to Night of the Zealot. In the last scenario (Devourer below), Mark Harrigan was sitting in a hiding spot at the main path, with an extra hand for holding a side-arm, reloading the Springfield regularly. Never have the forests felt so tranquil... Cultists spawning aloof and getting headshotted, while others just walk past was, well, satisfying, to put it mildly. The fact that the sniper never had to move saved a ton of actions to him. We had 3 doom to go when we disrupted the ritual.
It's true that a sniper has to take the risk of hurting allies, but e.g. Mark, with only the rifle and his base stats, was fighting at skill 8. We playing on Normal, most of the time only autofail was the risk.
Elite monsters will be an issue (good thing the big boss didn't spawn), but you usually know when there will be one, so you can plan ahead.
Probably needless to say, but the new taboo ability saves practically no actions in scenarios with a linear map: in such scenarios, typically all investigators have to walk to the end of the linear map, also the sniper. But off the top of my head, I would say such scenarios are a minority; most have at least a somewhat central location good for sniping; maybe not as ridiculously OP as the main path but still.