This is a single very arcane trial being used to address a major analytic issue. To do this adequately would require a large set of trials addressing a range of important clinical questions. I cannot see how it would be possible to generalise from the proposed analysis.
Can the proposed research be reasonably addressed using the requested data?: Yes, or it’s highly likely Recommendation for this data request: Not ApprovePlease see comments above. This does not seem to be of potential scientific interest, more a trial run of their analytic framework.