"New" Picker
We are using the newer picker in our lower lifecycle, and in many ways I prefer it. We have not moved it to prod yet, but there is one big hole for sure that will prevent that.
I have a picker from the consumable table, which shows name, currency, price and available count. In the new picker, it does not show any column headings, so I end up with mouse, USD, 5.99, 4, which will confuse the heck outta my users :-)
Answers
If you are talking about "new" request offering query picker replacing old grid view of query results, I don't know about any way to display "column headers". Maybe some CSS hack?
This could be great feature request as this functionality completely makes sense.