Android Settings xml
What you want to achieve should be possible using adb backup (no root required):


Enable ADB USB mode on all devices (have to be done manually, AFAIK). 
On the pre-configured device perform an adb backup of -all or if you know it only the relevant system settings app (I think it should be com.android.providers.settings?).
(optional) Decrypt and decompress the crated backup using Android Backup Extractor. You can now extract and edit the data in the backup, removing unnecessary/unwanted settings. Afterwards recreate the backup file using the modified data.
On each device perform an adb restore using the created backup from step 2 or 3.