A product suggestion that could save time when users are merging duplicate tasks:
Asana should automatically copy the attachments from the closed task to the main task.
I often find when I’m tidying up by merging tasks that different users have attached relevant docs to the different ‘versions’ of the task. This means someone has to download all the attachments from the ‘closed’ task and re-upload them to the ‘main’ task, to make sure that all relevant work can be easily seen.
‘Merge duplicate tasks’ is a great feature that could be even better IMO.