In singles too its a move that bypases light screen, reflect, aurora veil. If it would work like Feint would be great. A spy should be poison...Regarding Sniper Shot, in singles it will be pretty much outclassed. I can agree on that. However, it’s in Doubles and VGC where it will truly shine, as it totally ignores Follow Me shenanigans and Water Absorb / Storm Drain.
Sure, out of the starters’ signatures it’s the most situational, but it is still fairly usable.