Hey I also have a similar question.
I recently purchased a Wahoo Elmnt Roam and would like to match the Trainerroad Zones to the settings of my Wahoo.
Is there a simpler way to auto calculate the zones in the wahoo app? The 7 Zone settings of Wahoo doesn’t seem to correlate to the zones as by Dr. Andrew Coggan. I now manually entered the values for the 7 zones as I have them in TrainerRoad in the Wahoo Companion app, what is annoying is that the names/categories do not match at all. 
And it makes updating my FTP on the device quite complicated. Anyone got some tipps?