This extension isn’t very useful to our team without this specific capability, as we make almost all of our Asana tasks using templates (that contain dozens of subtasks). Hoping that others in the community would benefit from this feature, too!
Since task templates currently live in projects, the feature would be constrained that way, so it might make it less likely to be implemented so long as that’s the case.
Thus, it might be helpful to this request to also vote for this popular request:
Hi team - one way to get task templates working in projects beyond the one it was created in is to build it in a Bundle. Using a Bundle, you can build the task template (or rules, fields, sections) once and deploy it onto as many projects you need it to be on.