The devs hate creature handlers. I'm glad I respeced out of MCH. After the CU all my pets were either too high level for me to use or so weak as to be useless so I quit the profession.
I have 3 pets that did not get reset to 1(0), but my favorite pet, a level 63 brackaset is now a 1(0). WTF, over???? I want my level 63 back, It was a great pet because you could ride it, and it has a rainged attack.