Just to provide closure to this in case anyone comes across it in the future.
After upgrading some of my network gear I discovered that the port my 2017 model TV (Sony kd65x8500e for those playing along at home) was connected to was only operating at 100Mbps. After checking the spec. sheet I was bamboozled to discover that Sony's 4k smart android TV was designed/sold with a 100Mbps Ethernet port (in 2017!!) this is perhaps the single most baffling hardware decision I've ever seen from anyone. In any case I now have an Nvidia Shield connected and it plays everything just fine.
Nothing needed to change with my DrivePool configuration and I remain very happy with the software.
