With a solution that let us connect the KPA and remote to a LAN (external PoE-capable switch) I would also like to see audio over ethernet (AVB or Dante) because it has less latency than USB.
AVB requires hardware clocking support on the ethernet port (IEEE 1588) which almost surely the Kemper eth port does not have. Even if Dante could be implemented, it requires a license be paid by Kemper to Audinate which would increase the cost of the KPA. If you want Dante, you can buy a Dante AVIO adapter and connect it to the KPA's analog stereo output. Unfortunately those adapters have risen from their original $99 price to $200 but they work great.
The Dante AVIO USB adapter is $40 cheaper and might work with USB audio on the Kemper but latency might be an issue as you stated.