What is the impact of a change in custody of a child of one parent on the relationship of the other parent?

I am now required to embark on a fresh enquiry as to what is in the best interest of the children under these circumstances. Under Gordon v. Goertz, the court should include in its consideration the following: (a) the existing custody arrangement and relationship between the child and the custodial parent; (b) the existing access arrangement and the relationship between the child and the access parent; (c) the desirability of maximizing contact between the child and both parents; (d) the views of the child; (e) the custodial parent’s reason for moving, only in the exceptional case where it is relevant to that parent’s ability to meet the needs of the child; (f) disruption to the child of a change in custody; and (g) disruption to the child consequent on removal from family, schools, and the community he or she has come to know.