Tyler.

Are there any specific recommendations from your end regarding ethernet? 

I run a MacPro cheese grater 4.1 updated to 5.1 with macOS 10.14.6 and I was just in touch with Motu and nowadays they only recommend using usb/thunderbolt to connect their gear to the computer. This is due to Apple not really supporting avb solutions anymore. 

Is this something I need to take into the equation in regards to the H9K?

/Jacob

I don't believe we've had any reports of H9k users having connection issues with MacPro cheese grater machines, and I don't think there would be any issues with your setup since Emote 2.0 is supported for macOS 10.11+ and the H9k is supported for working with an ethernet connection.