Two-ways calendar integration

This is both a question and a request: currently it appears to me there is no way to modify an item created on Monday and synchronized to an external calendar from said calendar, am I correct?
Nor it is possible to create an item from the calendar as well. Right?
I mean, I saw there are some for pay option around, maybe, but this is not integrated.
My question is: are there any plans to integrate this feature in the future?