While I’m sure we’d all love to be able to split and join barlines whenever and wherever we want, I wouldn’t be surprised if we will still have to wait a while for that. One lovely compromise in the meantime would be an additional option for “barline mirrors bracketing” (with a more elegant wording; to complement to “barline joins all staves”).
I frequently find myself a bit flummoxed as for best practices when working on psalms. Sometimes I have a melody with accompaniment, in which case, no problem. But if I have a melody line with SATB underneath, then things become a bit trickier. In the middle, I need the staves to not connect (to not collide with lyrics) but I would love it if at the end of the refrain, a final barline could follow the bracketing. As it is now, I can either not connect any barlines or connect them all which appears odd to my eye. Options to either follow bracketing or sub bracketing (at that barline only!) would solve this for me.