Yeah, that's why I got that addon to hide the Blizz quest watch. I got tired of opening/closing my Carbonite Quest Watch window every time I zoned or reloaded the UI.
I keep my Carb QW window a fixed size, and use a kgPanels panel behind it to see it well in any situation, but I also keep it minimized (closed?) at all times unless I need to look at something. I also have it set to a key bind so I don't have to keep clicking to open/close it. You really only have to open the Carb QW for (literally) an instant to have it hide the Blizz QW. Before I installed WFR, I would open/close the Carb QW so fast, I only saw a flash of the dark background and that was all it took to hide the Blizz QW.
Minimized
Maximized