It is just a shame we didn't get the best of the MMS and the DX10 together. One step forward and then two steps back springs to mind.
4 steps forward - longer face, improved head/body proportions, more of a shoulder slope, double-jointed elbows
6 steps back - clothes aren't as good as MMS either in fit or in their overly clean appearance, Minoton neck is grotesque, headsculpt profile was a dis-improvement, PERS eyes just cannot look natural for the most part, Removeable access panel breaks up the head and makes it look more toy-like, reduced skin detail contributing to him looking too young (the soft sculpt thing that people refer to)