My users just caught something in which I think to be a big issues at least for my organization and users. I understand not being able to edit other peoples submissions for now (however, i'm still hoping this changes so anyone can edit anything that has been submitted).
My users are not able to go back and edit a submission because I have made an update to the form. I understand they why behind this, but I also think they should still be able to edit the form but canvas should be able to pull over all previous data to the new submission. Our forms change all the time and my users wold like to have the ability to edit their previous submissions even if their is a new version (canvas should be able to merge he old with the new to create a new submission).