I think you need to look at sync playback of the generated tracks in the local folder.
You need to be able to adjust the vol and pan to preview those tracks with the existing tracks in the DAW.
If you are just using one instrument track at a time like DI MultiRiffs per plugin and sending that track to FX then you can use the DAW track vol/pan.
Same with midi channel if you are sending midi tracks from the Plugin if you can re-channel each track to the selected channel, at the moment you can't tell what channel the midi tracks are on, so if you had a simple track mixer like VstSynthFont it would handle everything.
Originally there was no sync playback it was the same as using the main BB and dragging tracks out into the DAW to see if they fit if not back to BB.