My big hopes for 0.7 is to separate the new species... Bats and Harpies (while one of the least fertile species) still fill up pretty quick, and Demons and Succubus forget about, despite their stats, Succubs get pregnant at the same rate as Bovaurs (the most fertile race in the game !!).
Also males of some species... I have not seen in 666 any males of the following races... Harpies, Bats, Seraphim, and Succubus. I know Bats and Succubus are new so maybe they only have female and futa variants, but Harpies and Seraphim had their males already, unless he plans to "feral" those two... which I am not all about... I personally like the human/beast hybrdis more than the full Neph ones...
Hopefully by v.8 or v.9 he makes it so if the breeder bangs a neph and produce offpsring we get those human hybrid ones every time... also some should honestly be half human by their mythic origins... Seraphim should always look humanoid, except for their wings and colors/tattoos, same with Harpies, and the upcoming painted elf race.