Not sure about that. Deltanet > Crew Resources, Staffing, just under AE's, there are "simulator period preferences" run reports and result reports that show how these preferences might have been considered. Kinda like PBS composite reports, though it doesn't show the bids(preferences) for each pilot.

Not exactly a reasons report, but it does indicate an automated process that wouldn't necessarily require a training scheduling person to look at your preferences since the script already did it.

To be clear, I'm not vouching for the script, or that preferences even work. Just that there does appear to be some kind of process being run on them.