Kevin Kennedy "PhD" that answer to her problem is completely unhelpful. All you did was repeat what she said and tell her her son has a behavior problem. Are you sure you have a valid PhD...that is not a question. Sweetie, (if this is actually posted), temper tantrums are common among toddlers especially when they are going through changes, whether you just moved, introduced someone else in the family/home, or switched hours. Even though it's common it's not okay. You should talk to him about not hitting, try acting out scenes that are not okay and scenes that are okay, in terms of handling his emotions. He should have fun doing that. You can also get the book "Hand are Not for Hitting" and read it to him often, like every night. Pay attention to him, and when you see him about to breakdown help him calm down. I tell my two year old son to breathe deep breaths and show him how, he thinks it's funny and forgets about his meltdown most of the time. When you see him handling his emotions well tell him good job! I hope this helps.
You already identified the main reason for the change. You altered his routine, and this inevitably causes disorganized behavior in a young child. The program makes a major mistake by not permitting time outs. This behavior can be remedied quite easily, but not if the program fails to establish clear limits and then enforce them. There is no reason for any evaluation. This is a clear behavior problem - it is not complicated.