Job evaluation by proofreader

I like the 5-point scale job evaluation because it is useful and very simple at the same time. But it looks like this feature was built with the intention of having the Project Manager enter the evaluation. I would much rather have the Proofreaders enter the evaluation for each translation job - ideally in a way that the job can only be moved forward to the next status once the Proofreader has entered the evaluation. That way we would collect evaluations for each and every translation job, without any hassle for the Project Manager.