I feel like gangster guy should have been cut from the film completely to give Ghost some more room to work. I think she has one of the more interesting powers in the MCU. If they could have maybe shown her pain and suffering, shown some side effects of her time as an indoctrinated shield assassin, and the mental instability that would come along with all that instead of covering it all in a 2 minute exposition scene, she could have been real good. They could have even had her linked to the mother being rescued with her somehow.
The way things were, I kind of feel like Ghost wasn't even in the original draft and the main conflict was with Goliath working with the gangster dude but at the last minute some Marvel exec decided they couldn't do that.