A lot of DJs manage their track database with iTunes and therefore only use Engine Prime to get their tracks and playlist synched with their Engine Prime enabled devices. Now there is the Sync Manager but it only applies to the Engine Prime database.
The workflow is to import all crates from iTunes to Engine Prime (EP). Then use the Sync Manager to copy everything to the EP-enabled device.
Right now there is no way besides deleting and re-creating all crates in EP, deleting everything from the EP-enabled device and then copy everything all over again.
My proposal would be to enable re-importing iTunes crates without deleting them first. This way the Sync Manager could be used as intended.