On a related thread, @Roberto_Viola offered to enhance the qdomyos-zwift app to support the Zwift Hub, so you can manage the base resistance through a 3rd party app. That’s probably the only way this will be addressed in the short term.
The problem with gear noise in the last 3 cogs is probably an adjustment issue. If you’re using the XG-1270 I assume you found an XDR freehub for the trainer?