I have no issue with indiscriminately killing always-evil humanoids if a particular campaign world is based around it, and I have no strong preference for whether the "default campaign setting" of Next is this type or something more nuanced (as long as both are still a part of the edition as a whole).

However, I would like to point out that, if orcs & company are presented as more complex societies rather than monolithic evil, the DM is still free to offer pure amoral hack & slash opportunities in the form of undead, constructs, and fiends.