Received and installed mine yesterday. Very happy with it so far, but it will definitely need some firmware tweaking. Night time is a bit noisy and day time is a bit overexposed at the moment. Other than that, I am really liking it!
Only things I have set so far are turning on WDR, set time lapse to longest (10 minutes), and set date and time. I think I'm going to set the exposure to the first negative value and see if that helps with what I'm seeing. I look forward to seeing what you change as well.
I don't think there is much benefit or a difference between the A119v2 and A119 Pro. The higher megapixel count in the Pro will probably equate into noisier and lesser night time quality. A lot of these dash cameras are packing in similar sensors as those featured in IP Cameras discussed here.