I use exactly the same work flow as mentioned above ie dropping the audio into the Bandmate in EZDrummer3 (sometimes I split up the audio into stems and drop the audio drum stem into BandMate).

Now when the multipicker is in place it would be great if PGM could add a similar concept in BIAB in order ease and speed up the search for a particular drum rhythm within the drum library (and the same in finding most similar matching styes for an audio song)