Obviously the ancients were a huge part of why the OTU looks the way it does, but how would things have turned out without them? First off, no genetic engineering and transplanting of earth species. So no Vilani, Zhodani, or Vargr. Earth would have been free to develop without running into an already existing imperium. Who would they have run into first- the Aslan or the Hivers? Perhaps some other minor races would have time to develop into major races. What other ways would the lack of ancients have changed things?