Chords for piano & guitar

Hello community,
A practical request concerning the effectiveness of the management of agreements.
It seems wise when creating parts of the instruments, to have the possibility to choose the line of agreements entered whatever the part creates.
It may be necessary to rethink the line of agreement above the staff as a common line and redistribute by choice, to the other instruments when creating parts of the instruments.

As you can see :

Photo 1: Example score with piano chords
Photo 2: Extraction of instrument parts
Photo 3: Piano part
Photo 4: Guitar part

Obviously the possibility of making a copy / paste is possible but very different from what I suggest in terms of efficiency, currently there is not the possibility that I detail above.

I hope to have been lucid to explain this reflection, while waiting for a future development to this problem, I wish you a beautiful day.

Max Delbé