I also think Pugh has more grit and steel than Johansson. I can buy her as a killer far more easily.
@Otomofan I agree about the sanitized gun violence. Still remember that scene from Iron Man like the day I saw it. Also recall Pulp Fiction, when Marsellus is shooting at Butch and an innocent bystander takes a stray bullet to the hip, graphically dropped, bleeding and in pain.
Explosions are dangerous too -- pressure waves go through bodies and smash internal organs, hot gases destroy lungs, shrapnel peppers tissue ... but Black Widow gets her ponytail singed and needs an Ibuprofen.
Suspension of disbelief gets stretched too thin. I don't expect a Tarantino film but the MCU is too cartoon-y now. Ah well. To be expected I guess.