Hi,
When we create a custom field in Joomla there is parameters (label_render_class and render_class) to enter front display classes (label and value).
Can you please output it in span classes after field-label or field-value.
I would be very helpfull to style fields output ...
Eventually you could also add an option to your component to autoadd field name as a class after "field-label" and "field-value" in span classes.
Cheers !