You are happy with the service you are getting.
You don't know if the new advisor from Hibernian Life that will be assigned to you will be equally as good, better or worse that your existing advisor.
You don't know if the terms/charges on the Canda Life pension are the same, worse or better than the existing one.
You are automatically assuming that he is out to screw you.
Why is he changing companies? Are your best interests at heart?
You have to find out the answers to these questions.
If you like the guy and you have a good relationship then you should be able to get straight answers. If he is genuine he should be able to give you written reassurances on any concerns that you may have.