EDIT: Yeah, selecting Drums should no transpose, but it is, so will have to contact them.
I was thinking you could use multiple ADSR plugs in MiniHost,
the midi could be set to different channels on the MiniHost midi track in BB and have a channel filter before each ADSR plug.
Maybe another how to MiniHost video job for you

I ask them to add an auto DAW sync play option to the ADSR just in case PG don't get around to doing that with the BiabVST, this will them play the generated tracks in sync to the DAW for preview.
I will think about it more tomorrow, but with the key change if you are playing the loops with the midi notes that will be transposed when you transpose BB.