Our users are hyper-sensitive to suspicious activity and having features enabled by default that email them, notify them, modify their settings causes constant false positives. At the very least, turn the features off by default for everyone except global admins so we can test it out before deciding the business value for our company.
Give option to open in "Read only" mode for the library OR per file. This will eliminate accidental edits to files that are accessed frequently.
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We are just starting to rollout SharePoint online and wish we had this feature.