Thanks for the suggestion. We actually monitored file handles, once upon a time, but had issues with it and decided to shelve it.
We have been discussing conflict handling, of late, and are considering the option to turn off conflict file creation (user choice). Versioned storage services make conflict files less necessary. Also, in many cases, conflict creation for primarily single-user storage setups can end up with a good portion of conflict being created when the user doesn’t really need them to be.
In addition we will be making enhancements to our conflict detection which will reduce false positives.