Well, if we are talking about a fair fight, then if sniper rifles should have one bullet kill at close range, it would by only fair that all other weapons, including shotguns, will be so accurate and effective on a long distance so they can easily compete with sniper rifles, right? ;)
With weapons, it's always a trade-off. Some weapons are better at specific distances or specific play style than others and I see no good reason why sniper rifles, already strong at long distances and headshots should have a role like a shotgun has on top of that. I however agree that the sweet spot mechanics is terrible and hopefully it looks like it may be gone in the last game builds (shown to streamers).
