As a noob to fighting game I will say Bang is hard, hard I say.
Perhaps better than Carl, but still difficult.
I think it might be because his attacks do not excel in damage, range, speed or combo friendliness. Damage is average, or below average, range is short, speed is not particularly fast and even the basic BnB combo is not easy to perform. Some moves such as the command grab are powerful but still they are not easy to pull off.
So I think that Bang has quite some potential in dominating the match and dishing out huge damage, but the players have to learn his awkward combo etc which are not new players friendly.