Follow-up to above, here is the response from Esri AU support to specific questions I asked.
Thank you for contacting Esri Australia - Technical Support. My name is A. and I will be assisting with your case. Below are responses to your questions.
1) Are there fixes in later versions/patches of Data Reviewer that are not available to 10.3.1?
Yes each update of ArcGIS Desktop, will include fixes to bugs identified in earlier versions. Below is an overview of bugs that have been address after 10.3.1.
ArcGIS Desktop 10.4 & 10.4.1:
BUG-000083979, BUG-000087652, BUG-000090826, BUG-000092615, NIM103890, NIM104780, TFS81021, TFS68388, TFS81362, TFS81392, TFS81397, TFS813969.
ArcGIS Desktop 10.5 and 10.5.1
BUG-000104583, TFS91111, TFS92797, TFS95294, TFS95471, TFS95786, TFS97213, TFS98461.
They can also be source online here.
2) If there are subsequent fixes such as TFS100368 for Data Reviewer that are not available at 10.3.1, is there a plan to do this? (i.e. future patch 8 and so forth)
No, Esri typically will provide bug fixes for the current version of ArcGIS Desktop. If a bug has been identified at a particular version and is version specific, for example only occurs at 10.3.1, Esri may address fixing the bug at the version it is occurring. This particular bug TFS100368 impacted a number of customers, Esri released a patch specific to address this error and another bug at 10.5. The next release of ArcGIS Desktop - 10.5.1 will automatically include the fixes for bug identified in previous versions. Esri doesn't generally release a patch for older version of ArcGIS Desktop if a bug has been addressed in a newer release.
3) Please confirm whether or not “cumulative maintenance patch for ArcGIS Data Reviewer 10.5” includes all fixes for all versions of ArcGIS Data Reviewer
Yes, installing ArcGIS Desktop 10.5, then the cumulative maintenance patch for ArcGIS Data Reviewer 10.5 will address all bugs fixed in previous versions. (10.4.1, 10.4).
Kind regards,
A.