When using Master Data Management and syncing subsidiary's to parent companty's its a headachte to make sure users can not accidentally change the synced data in the subsidiary. Sure you can force sync overwriting their changes but the user thinks he changed something and then it gets reverted.

There should be an option in permission sets or just in general that you can set that fields that are being synced are not editable or at least give a warning. This would help so much in securing data integration. Right now you can only either lock the whole table but then you can't block an item for example in the subsidiary or change other fields that dont need to be synced.

Or you have to force personalize their UI so they can't edit the fields without changing their UI or block them from personalizing that all together. And it's a lot of work setting those UI personalizations up !