Please add dates to the tasks, something like "Due when?" and Proposed date.
Also please add some users fields like "Proposed by" and Assigned to, i think this is more like your future list "- Roles Owner/User, owner can edit/add tasks, user only can move tasks.- Add assignId to task, so only that user can move his task(?)"
Maybe instead of points 2 fields like Complexity and Priority.
Please update to Outsystems 9.1 and create an application, maybe you can use the attached image for the app.
Thanks for the suggestions.
Not sure if I got the time for it, so you are more than welcome to do it yourself if you want :)