It's really more time consuming that it is difficult to my understanding. Dragon Age II, Dragon Age Inquisition, all of the Mass Effect games, and a handful of other games I can't think of currently have all had full-voiced main characters. Dragon Age Inquisition is the only one that I really know of that had 2 VAs each for male and female characters, but it has been done before. It seems that this will more than likely be included later on in the full release because there are times when your custom MC will say lines of dialogue, though they are often just during cutscenes and not during conversations (i.e. when your character says "This seems as good of a place as any to camp" or something along those lines the first time you camp). They are probably choosing to push it too the full release due to not having all the lines of dialogue recorded/completed and only having an MC talk sometimes seems a little weird.
