Two suggestions

  1. Maildrop support textpaper
  2. A project has many Sequential tasks, like these:
    task1 @defer(1.1) @due(1.5)
    task2 @defer(1.6) @due(1.10)
    task3 @defer(1.11) @due(1.16)

Now I set task1 @defer(1.2) @due(1.6) . I hope Omnifocus can automatic set the others.
Tasks after setted like these:
task1 @defer(1.2) @due(1.6)
task2 @defer(1.7) @due(1.11)
task3 @defer(1.12) @due(1.17)
I have many Sequential tasks in my projects. When I setting defer date of the first task, I have to spend a lot of time adjusting the others.