Great point about needing to unplug and replug displays back in. I had issues with that at first, but it turned out to be a result of a bad DisplayPort->HDMI adapter. Now that I'm using normal DisplayPort and Thunderbolt cables direct to the displays from the dock I haven't had any issues. And if I need to change the input on one of the displays it's all handled seamlessly and macOS flips over to recognizing only one external display.