What is with enemies just charging into your group? what kind of tactic is that? shouldn't they hide and fire, we have the option to crouch take cover and fire, yet they just run up on you and start smacking you. make the ground enemies more tactful.
Just wait a bit. Yes they charge and attack in close combat but there are always the ranged fighters hanging back trying to get flanking damage while you fight off the melees.
Later when you encounter Romulans you will deal with enemies who heal their own in combat and who even revive their fallen comrads.