Thanks for the post. I knew about Cronofy - still waiting to use and try it.
I understood your point of view but let's make a mental exercise. For example, I couldn't achieve my daily goals for my tasks. So, in this case, I must reschedule the task, moving it through the next days until I got some space on my agenda to get it done. For me, moving this task it's easier to do on my agenda than in Evernote because I can easy get a weekly view or even a monthly view. With a weekly view, I can be able to reschedule the task SEEING the others events, compromises and tasks at the same time. Otherwise, based only in Evernote, I can't see the others events. Make sense to you?