Humans, Gnomes, and Dwarves were also altered by the Old Gods. They were -given- DNA by the Old Gods. Your argument is invalid.
As a general thing for the thread:
Making any of these "Subraces/New Races/Allied Races" now takes the same amount of effort as making literally any other race does because of the Unified Player Skeleton. There is no "New race on the Nelf Skeleton" there are only Nelf Animations on the Unified Player Skeleton being applied to whatever the new race is.