"Reply as email" option while adding new comment to task.
There should be an option to "reply as an email and enter email id to reply" option while commenting on a task. Same way while the person from another end replies to same task it should get added as comment to the task not as new task. This will be great addon feature to Wunderlist and I am sure many freelancers out there will love it. I am currently working as a freelance developer and I am sure most of my clients will not bother to login to Wunderlist to add comment or task.