I know it's coming but my opinion about it is that it is for the elitist players, at least that is the line where I draw the mark.
After it comes everyone that doesn't dual-spec will be though as strange or odd(this is what in my opinion happened in wow) and I don't want to learn two ways of playing one character.
Then there are the gear switches, more ninjaing for off-spec and such. not a good thing.
One good thing is that you can probably find a flashpoint group faster but that can be solved in other ways.
In my opinion it will make the game worse for me.
Peace.