In terms of maintaining or even increasing the visual variety of the roster, them choosing to add 4 out of the 6 first new characters with almost completely black outfits is not the smartest thing one could argue...let alone making 2 ouf of those 4 wield dual pistols...
I mean, save for his arm and her stun baton, Winter Soldier and Black Widow look like they could have been selectable alts for one single character imo. I never understood the appeal of Widow in the MCU either to be honest, beyond her sex appeal as a red-headed assassin for many viewers of course. Same goes for the new (aka not visually distinct or appealing) version of Hawkeye to be honest.
Sigma, Black Panther and MonHun do look cool though.