As a worker of many proyects at a time I need to be able to see all my tasks from different proyects in a task page and reorder with drag and drop according to the most important to less important so that I can concentrate on working on the most important tasks first.
Actually drag and drop in My Tasklist is not needed.
In your usecase, you can utilize the Sort button to sort by priority. Incase you only want to look at a particular project you have the Filter button.
I would still like to be able to re-order the tasks because there might he 10 high priority tasks and I want to be able to re-order these myself.