It's almost working!
Thanks for moving this.. I have noted the new location and will put all future feature requests here.
I actually decided to try and get datePicker to work on it's own last night. I built a fake form with the 4 date fields that I require, all setup as they are in the regular DataAssist form and used CSS Form builder on them making them all date pickers.
What is required for these dates to be properly formatted before they are submitted by the query?