I see what you mean.  You can directly control the morphs via the morphbrush, yes.  However, as you pointed out, the morphs must be already loaded, and present in the figure, and range of motion is restricted to those targets.  A facial "rig" like exhibited in the video, offers much more freedom of movement over the mesh, and allows the animator a fluid, and organic work environment that currently isn't possible within Poser.  I'd like to see future versions of Poser Pro take a serious approach to some deeper, more flexible structure for controling facial expression and emotion.  Nothing  impacts character believablity more than the ability to create realistic and natural facial expressions, in animation or still renders.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.