The forecast is of limited use. It helps you to see what is due on a specific day, but it doesn't provide an overview over the next few days (or the next week) at once. You would have to click on each day to see whats on it. Furthermore, while I assign due dates to each task, some of them need to be worked on with a different priority. I need to have those high priority tasks with a possibly later due date always in my sight. I think GTD dictates that a task must not be longer than a specific amount of time, but this simply isn't practical or possible for all kinds of tasks. To a limited degree, this can be modeled with the perspectives and the flagging. But still, it feels like the App doesn't want to give me the views that I need.