It would make more sense to have game design students do a design document industry standard instead of making them do a glorified essay on a subject topic.
They can structure it with a bibliography and all sorts not to mention add to it as they do their final year game project. For people not actually doing dissertations in working life, it makes no sense for them to do it at Uni when they could do a professional version of whatever documents they will be compiling at work in their chosen industries/ sectors or whatever..pro boffins can stick their essays and whatnot.