How about:
Drow being dark-skinned. A subterranean species would be pale-skinned.
"Races" rather than "Species."
This isn't as much D&D, as I think the rules as written clarify this point, but many even long-time players still think that Hit Points refers to actual body damage rather than a combination of body, fatigue, and just being banged up and bruised. A 20th level character wouldn't be able to sustain 20x the physical damage of a 1st level character.
I've always been irked by the over-simplicity of attack bonus. STR should be a factor, but so should DEX and even INT or WIS. Or maybe the average all four, or the average of the best two, with every weapon having an STR threshold below which a penalty is received (e.g. STR 12 for longsword...you probably need to be above average STR to wield it properly).