Thank you for your suggestion.
When I encounter the problem of overlapping or obscured extensions, I will first use the small font on the problem bar. If the problem persists, I’ll consider making the problem bar longer (which can cause other problems).
Some chords can be written as a shorter version
Δ instead of Δ7,
instead of -7b5
What works best for me is to write (using TEXT [abc…]) and copy the obscured/illegible quality below the chord. That doesn’t interfere with or confuse the player, it’s easy to read and, if the chart is transposed, still displays correctly.

Using Text For Overlapping - Example


)BOB