There is a previous post regarding how to work around the OTB rectangular footing family not scheduling the thickness.
This is a really easy fix for the next release of Revit. Change the existing parameter in the family to be shared.
Its been broken since I started using revit in RS4. Its never been fixed (as of Revit 2015). As such, the OTB family is never used.
5 minutes and any revit user on autodesks staff could fix it.
Cheers