Correct, the 2019 new controllers do have antenna jacks, the pre-2019 do not.
Have you got pics to show said connectors? As I just mentioned, I didn't see them. Please correct me if I am wrong, but the Pro 575 and Pro 780 are considered 2019 models?
For example, here is a pic of the back of the new Ironwood D2 controller. Note near that little loop of wire in the upper right-hand corner, it is printed Antenna on the circuit board. That loop may be the only thing being used and just to the left of the screw is the micro connector for the WiFi loop!
If the 780 has this, then I know I can make antennas for us all. I'm pulling mine apart when I get home and check mine. If it does, I'm ripping open an old dead AP and stealing the rubber ducky antenna for my grill!!
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I purchased the 2019 Timberline because of the improved Wirefire wifi capability. Would hope all 2019 wifi models are same.Thank you! That helps greatly! I will report back. If the 575/780 do not have these, then I know how to add them.
This is good stuff guys. We may have a solution in the making.