The problem you're citing is with positional awareness and sniping competency, not the MIDA. The MIDA can discourage sniping, but will not beat out a decent sniper. If I see you sniping, and I hit you, and you don't take cover, yes, I can kill you. It's up to the sniper to take cover, or position themselves better. At close range, the hip fire of the MIDA is trash. I switch to sidearm because I don't want to deal with shotguns, and my melee can close the distance for a quick finish. Or the sidearm will force my opponent to try to back away and take cover which will let me switch back into MIDA.