:Completely unacceptable rewrite, sorry. 
 :Please answer this point before attempting to try editing again (rather than rewriting) my introductory section: 98% of those who come here can be presumed to be baffled by UTF-16 and what it's about.  They need an introductory section which explains things simply.  Really as simply as possible. 
 :I don't personally give a monkey's whether UCS-2 diverts here... change that then if you're so obsessed by this, and create a UCS article.  In fact I'm going to do it for you.  And/or you have the option of explaining the history of UTF-16 in a subequent section in this article.  In fact I'm going to do that for you too. 
 :What you know in your heart of hearts is that very few people are going to bother reading either such a section or such an article.  They're not going to be interested, and you have no right at all to interfere with their legitimate desire to learn how UTF-16 works from the motive that "Oh, but they have to know what UCS-2 is and how the IEEE and the UC battled it out."  NO. THEY. DON'T. 
 :By all means edit my stuff if you find it not neutral enough.  But I repeat: the primary function of this introductory section is to explain the basics, in simple terms.  You have no right to make it confusing for non-IT-experts in the way your rewrite did.