On the subject of interbreeding between races, Morrowind lore (As taken from the in-game book "Notes on Racial Phylogeny and Biology") has the following to say:
After much anolysis of living specimens, the Council long ago determined that all "races" of elves and humans may mate with each other and bear fertile offspring. Generally the offspring bear the racial traits of the mother, though some traces of the father's race may also be present.
And also this....
The reproductive biology of orcs is at present not well understood, and the same is true of goblins, trolls, harpies, dreugh, tsaesci, imga, various daedra and many others. Certainly, there have been cases of intercourse between these "races," generally in the nature of [censored] or magickal seduction, but there have been no documented cases of pregnancy.
The bold is added by me, to draw attention to sections where your mod seems to conflict with in-game lore. So, my question is this...Have you checked over the in game text and dialogue for references to interbreeding, and made the necessary changes for this to fit within the game, or not? My purist senses are tingling....