Yeah, well, no responses. The Drow is pretty broken.
First, reloading the hand crossbow should take a full action. So the two attacks ain't going to work as is.
The Drow can;
shoot the hand crossbow and attack with the short sword on the first round
or
attack with the short sword twice
or
attack with the short sword and reload the hand crossbow
or
or reload the hand crossbow and shoot
Darkness is vague. If the Drow casts magical darkness on himself then it should obscure the vision of his enemies allowing him to attack at advantage for 1 turn. But since faerie fire already does that, darkness should do something else. Foes of the Drow attack him at disadvantage for 1 round?