does moving out before seperation cause issues -?

Hi
The usual recommendation is not to move out until the concent order is signed off. The problem you may face if you do not is that all momentum behind the proceedings stops while your s2bx sits in the FMH while you pay the bills etc. Also when concidering a property to rent you need to make sure that its sufficient to allow you to have the children overnight.

As far as I understand the wikivorce service collects information and files the papers with court making sure everything is correctly done. If you file, your s2bx would probably be advised to seek a solicitor to offer a view on the fairness of the concent order, but is possible for you to use just use the wikivorce service without other solicitors being required.
Why not give the help-line a call and they can give you more details on what they cover.

LB