I love this idea, now time has moved on since, is there any more development or tools to be able to do this? I too don’t want to have loads of meta boxes just to insert a few fields to products where there is already a perfectly good native Woo meta box.
I think in ACF it would be good to be able to Append or prepend fields to existing meta boxes that would be amazing
This is great.
I would love to see this integrated natively. It is a very powerful enhancement.
Also added PER FIELD instead of it just applying the limit of 3 to every taxonomy drop down selection. (I guess you can just target by class name)
@elliot