I was also excited initially with the global shortcut, but I’ve found sometimes the popup doesn’t load correctly. So for a different reason, I went looking for an alternate solution.
I now use these two shortcuts in succession (that use just my left hand):
[Windows] + [1] (This opens Asana, which is the first pinned icon on my taskbar)
[Tab] + [Q ] (A native Asana shortcut to quick add a task)
This is just as fast as the global shortcut. It also provides the flexibility to directly add a task in a certain section of “My Tasks” (where I typically leave the app) after inputting [Windows] + [1].
Hope this helps.
–Paul