MC v5 has additional features for AutoSync that would allow you to still make sync dailies via REDCINE X for DVD's, QT, (review copies and such) and still import the BWF into Avid for syncing and metadata tracking. You can choose to keep audio on original video or to remove it as part of the one step sync process. So basically giving you flexibility in your workflow.
One of the considerations is how many audio tracks are in your BWF and how many you want to track and use in editorial. I was just dealing with a production doing an Altman style overlapping dialog film where they will be using three SoundDevices resulting in 24 tracks they want to keep and have access to during picture editorial.