Hello ibitebcareful
We do use a few tera1 zeros FW 4.7.1 with Horizon 7.2 and it does work. However to get it running the upgrade to 4.7.1 and the implementation of the steps in your provided link was mandatory. In my opinion if you followed the steps correctly it should work.
All I can recommend is to make sure your VDI-Desktops did refresh their GPO and the registry key is changed correctly.