Its bcs of small maps and 4v4. I canimagine sniping would be much easier in3v3 game. Now you have always someone near your position.
It goes back and forth. First we had the Felwinter's Lie sniper and then the Felwinter's Lie shotgun in D1. Right now it's back to shotguns since snipers are bad right now. Main issue is the maps are not made for snipers. If they bring back some large maps like First Light then snipers can be more useful even with their current setup.