I work writing and rescoring music for my church and others. Every church music publisher that I utilize, OCP (Oregon Catholic Press), GIA Publications, and WLP (World Library Publications) to name just the top three, all utilize capo chords above the actual chord in bold with parenthesis around it:
Right now I have to use a text block above each chord line and space the chords out with whitespace between them so I can keep them horizontally aligned, but if I make any adjustments to the measures or change lyrics, the spacing of the chords changes and I have to update the text boxed manually to get the capo chords realigned. Two other disadvantages are not being able to change the key signature of the piece without having to manually update the chords, and the human error factor of potentially entering the wrong chord whereas the current capo chord (in italics without parenthesis) will automatically properly transpose the chord.
I have been requesting this for years in the forums and trouble tickets, and I hope a post here will help bump the request :)