The feature I'd like to request is to allow a reviewer to optionally choose to have their approval "stick" if all of their defects have been addressed in a review. As an example scenario: Reviewe...
I think there are a couple of things you may be able to with existing Collaborator - typically if a reviewer doesn't want to have to re-approve every time a new comment is made, or in the described scenario, when a new file is uploaded, when clicking Approve the user is presented with options on when to be notified (which I believe means your status also goes back from Approved to Active) - when any activity occurs, file activity occurs, activity by author, poked, etc.
So if a reviewer wants their approval to stick, I think they could choose the option to be only notified when they are poked. One thing to note is that some role types may be required to read every comment (that is configured by the Collaborator administrator, in the role settings I believe), so these notification options may not be available for every role type - you may also need to adjust Collaborator's settings to turn off the 'required to read all comments' option for certain roles (but I do also agree with what johnmcdraper was saying, it often makes sense for certain role types to be required to review every comment / file revision / etc.).