Quote:
Imagine this workflow. Select a few bars somewhere in the middle of arrangement and drag them directly to DAW, so they fall in the right spot in timeline as individual tracks (centered and dry), but just those bars that were selected, nothing else. Sort of building block concept.

You could even have another instance of Biab with different instruments and drag the same section under the other tracks in the DAW.
You could select an extra bar at the start/end this will give some adjust in the DAW to merge better.
In Reaper you can have the chord regions with different colors.
Reaper has a region player that will play any selected region in any order you like. You can render the regions selected.
Reaper Extensions > Region Playlist

I suggested some time back to have these options in the Audio > Export Song As Audio File.. they would be helpful in the + DROP option.

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Dry-Flat-Center.png (4.9 KB, 166 downloads)
Biab-Drag-Bars-Multi-Tracks.gif (431.96 KB, 220 downloads)
Biab-Drag-Bars-Multi-Tracks2.gif (282.43 KB, 166 downloads)
Biab-Drag-Bars-Multi-Tracks3.gif (444.3 KB, 143 downloads)