It would be amazing if there was a way to sync data between a parent task and a subtask (or even better, a parent task and a sub-subtask). If a change was made on the parent task then it updated on the selected subtask or vice versa. It wouldn't be for all subtasks of a parent task either; it would be most beneficial if you could select which tasks/subtasks, etc. would sync with each other. I'll try to explain our use case to help explain further. We have large projects. We use a list to store our project tasks and one top-level parent task that houses all of our project data. We then have a lot of subtasks, sub-subtasks, etc. under that one 'project summary' task. Sometimes a subtask is actually a required action for another team to provide some support or service for the project. We would like the support or service action to be re-assigned to the necessary team, but that team needs to have the relevant data from the 'project summary' task to complete their work. They could, of course, navigate to the top level parent task, but that's inconvenient, especially if you have to do it hundreds of times a week. Hence, they need the data from the 'project summary' task to be synced to their support subtask. If the support/service team adds data to the subtask, the project owner and project manager want to see that data reflected in the top level 'project summary' task. So the details from the subtask need to be synced to the top level task. I put together a rough drawing trying to show what I mean.
