@Paul S:Paul, thanks for your question.  We added "Solutions" to the name because the new MCSE certifications require broader knowledge and skills across solution areas that encompass multiple technologies.  We added "Expert" (and, by the way, "Associate" for the new MCSA) to consistently represent our mainstream technical certifications in progressive levels--associate, expert, and master.  I was pleased that we were able to add new meaning and consistency while bringing back the familiar and well-recognized MCSE name.