I actually love the inclusion of both models. I have a feeling there will be a whole subplot on their development and possibly a rivalry between the designers of both models. I'm thinking something along the lines of Granin(metal gear) vs. Sokolov(shagohod) in MGS3.
That said this clearly has changed since the early Versus days. The all purpose model clearly used to be human characters at some point(they used to bleed), but it's unclear if they changed with FFXV or with a later build of Versus. Either way, I'm okay with the change. Someone on here mentioned that it would incur less "ludonarative dissonance" as a result. I agree with this sentiment though I don't think killing in general would be out of the question as Noct and crew are fighting a war, but the fact that they won't be slaughtering massive armies of people does help keep the gang from Uncharted levels of dissonance.