you dont read patch notes and PTR reports?
.... www.worldofwarcraft.com would be a good place to start.
also avoids useless guessing of whats going on.
read PTR notes and latest patch notes. you will find out everything about 2.1.0
so i won't have to write it here.
they announced 2.1.0 about 6 weeks ago, because thats when it went to PTR more or less.
so.... ...... no comment......