FR: Chord symbols typography

Hi,
I have feature requests for Chord Symbols.
First, character spacing of Chord Symbols is too narrow for me. This is not a concern with serif fonts like Academico, but is noticeable with sans-serif. (In Japan, sans-serif fonts are used for chord symbols.)


When input as Staff Text instead of Chord Symbols, the appropriate character spacing is ensured.

The spacing that fonts have appears to be overridden in Chord Symbols.
Second, the same scale factor is applied to both for subscript and superscript components.


However, I want to set different values, like:

I would request improvements for these.