Just to point out, if you look at the numbers snipers are only "dominant" in trials and elimination. Other modes have balanced weapon usage. With regards to flinch, it's there but whether or not it's enough is going to depend on your personal opinion. One thing to consider is what gun you're shooting them with, if it's a high impact gun they're going to flinch more but if it's a high RoF type with low impact they're not moving much at all.