Mikee,
I don't think being up to using navaids is the point. I personally think that the QXC should show to a student that it's possible to fly anywhere using nothing but map and compass. That includes finding yourself again after you've got lost. Too many people, PPLs and instructors included, think it's not possible, or not necessary. It's quite possible, and not difficult; but it requires practice, and if you don't get that practice for your PPL, when will you? Of course navaids, GPS etc are useful too. But you need to be able to cope when your GPS dies, and you're in an area with no VORs etc - and there are lots of those; ever flown in Wales or Scotland?