There is no one arrangement that suits all families and above all the arrangements need to be practical and work for everyone concerned. Divorce changes things and sometimes a rethink is required. For example if a stay at home parent during the marriage needs to get a job and it isn''t unreasonable for the other parent to take on more of the child care.
However no parent can be forced to care for children and if neither parent wants them children go into care or are pushed about from pillar to post. If you can''t reach a compromise with your wife only you can decide where your priorities lie.
What you agree regarding finance will go back to your solisitor. Hopefully, they will go ok and write up a Consent Order. The consent order will go to court and a judge will sign it to make that part legally binding. However, sometimes your solisitor will tell you you are getting a bad deal so back to mediation you go to renegotiate.
However, children aree different, that never becomes legally binding. A form is sent to court to show you have considered children''s needs, but what is agreed in mediation about children never becomes legally binding, either party can change their minds at any point, a day later, a year later, ten years later....