This has confused me as well. They have 4 Elven races ( yes I count the 1/2 ones as a separate entity), but no gnomes? I could have done with out the 1/2 Drow and had my beloved gnomes instead., but I'm keeping my fingers crossed that they will be added at a later EA update!
I'm hoping Tabaxi will be added at some point, but they're not base PHB, so either they won't or they will only be after full launch.
