I kinda agree. When i first saw the movie, i couldnt sit and breath. My eyes wouldnt blink. I was frozen. They shouldnt have let Bucky shoot Nat that early. They should have let Nat fight a bit more.
If both BW and Hawkeye can handle Aliens and Androids then JJ and LC are more than capable of holding their own against these very same adversaries.
Superpowers? Mess. Jessica wasn't all that strong. Luke may be able to fight Avengers villains but he'd need some training. As it is now, BW and Hawkeye would absolutely decimate JJ and Luke in a fight
BW and HE are trained killers. They would easily figure out that Luke's skin is unbreakable and target him with something he would have to breath in to take him out. Both HE and BW have equipment to do so. Jessica Jones has super strength, but she doesn't have proper trainer (as seen on the show) and they could easily neutralize her. JJ and LC are not on the same level as BW and HE.