Good news, this feature is partially done. :)
Planner tasks can now be copied to other plans. To copy a task, click on the “…” menu on the task. From there, you can select a different plan to copy the task to.
I would like to see this completed as well.
35 votesshailen commented
Agree with both the comments below.
I would really appreciate the compact layput and a print option as well.