My name is ***** ***** I have been a solicitor for more than 35 years
If the Decree Nisi has already been granted then I am afraid that it is now too late to revisit the Divorce Petition
If it has NOT been granted then you can make an immediate applictaion for permission to defend it out of time and to Cross Petition.
You would have to file both the Answer to her Petition and your Petition at the same time.
This will involve a great deal if time and expense which may or may not be successful.
With regard to the two documents I am afraid that her solicitor are correct - it would take too long to pull out of these what are specific factual financial enquiries for missing documentation of explanations of factual matters contained in the documents already disclosed.
In addition some of the actual factual questions are about minor matters that the Court would not view as relevant.
However to be positive it will not take you long to sort the documents into a reasonable questionnaire that they cannot reject
This website gives a good guide
Please ask if you need further details