[big_chungus]

You're right, that's better than it used to be by orders of magnitude. However, there remain things that "just don't look right". The most obvious I can spot is the teeth, followed by warped edges (odd indentations, a missing ear that ought to merely be partially hidden), followed by the eyes(more subtle, but definitely there). The "big swathes of skin" are generally fine. There are also wrong numbers of teeth, partially missing eyebrows, etc. Finally, there's not much correlation between apparent ethnicity and facial characteristics or hair. All these "just look wrong" enough to put someone off of a marketing brochure.

[viraptor]

These are random images though. If you do want something specific, you can dial the right knobs to fix the issues you mentioned and match up the features you don't like. Adding some extra constraints should be possible if you actually want commercial usage.