In my opinion it's becoming way too easy to OHKO Dialga now, Drago has Giratina, Gardy has Drifloon/Munkidori, Charizard has Dusknoir/Pecharunt, and the main reason Dialga was meta is because of Chien Pao suddenly becoming meta, and since now Chien Pao is just overpowered by every other deck...