WHAT IN THE NAME OF GOD IS GOING ON??

I wanted to get into SV OU, so I went to the Smogon Website to see what is viable right now. WHY IS ARAQUANID IN OU WHILE BLAZIKEN IS IN BL AND SALAMENCE IS IN RU? WHY IS CLEFABLE HERE? IS THAT DARKRAI? Well at least Dragonite and Gliscor are still around, but did Multiscale make that much of a difference when it comes to the difference between Dragonite and Salamence?