They are my most frequently used apps.
My way of using them is:
Doit.im is for action.
Evernote is for recording, and planing.

So, It would be great if doit im can work together with Evernote, so that:
1. when I writing schedule, planing my future jobs in Evernote, It could be possible that the action /project/goal could simultaneously appear in doit.im(which make your idea immediately actionable)

2. During the project processing, we could write the record on the comment blank in doit im, What if we can sync them directly in Evernote? It would keep our experience immediate and reusable.(Then we don't need to open Evernote again and record, and if the user is busy or have a bad memory, they are very likely to let experience dimish)

And for the task clone way of synchronization,which is not completely solve the problem. Since most of the people not only want to add actions into the inbox, they want to put the action in projects/schedule/goal. It should have a better way to add them correctly in the first time. Instead of reconsider the tasks again(kind of wasting time)