Hi Andy
I'm sure Juan will add your first two suggestions to the "to do" list. Thanks for the ideas.
About the third, you can already save the entire processing history. On the History View, take the "drag and drop object" and drop it on the background. This way you create a new Process Container, with all the steps of the history. Now, you can play with this container (double click the icon), modify it's contents, add new elements, etc.