To chime in here, the feature I would really like to see is the ability to group notifications into one daily or weekly digest email.
My team is particularly frustrated when new projects are created, tasks are assigned to them, and they get dozens of email notifications saying a task has been assigned to them. This is a very annoying way to be introduced to Asana.
There is currently no way to turn off “task assignment” email notifications without asking the user to temporarily disable all emails, and that is not a good workaround. Asana either needs to add daily/weekly digest emails OR allow users to choose when to notify someone by email (for example: when I assign a task, I can choose whether to do the email notification).
PLEASE look into this! It is difficult for my team to want to keep using Asana when their first interaction with it results in dozens of email notifications.