If you're thinking of going to university, note that only degree class seems to matter to the obtuse set of people who unfortunately for me call themselves employers. Do an easy degree at an average university, have a little bit of fun whilst you're at it, romp home to your 2.1, and then you can get on with a successful life whilst I empty the wheelie bins at the bottom of your driveway on thursday mornings. Otherwise you might end up like me toiling all night and all day with an impenetrable subject, only to be dumped onto life's shit-heap at the end, regardless of what real talent you may possess.
I have to agree with you on the fact that empleyers these days just look for a classification regardsless of the degree and a s you pointed out I would advise anyone to just do an "easier" degree. I'm studying Mechanical engineering and based on my first semesters performance I'm on my way to getting a third. But there is always light at the end of the tunnel. There are quite a few firms in london that employ people with a third. Most go on to post grad courses after gainning the lrelevant experience. So its not all lost. One thing I d have is experience, the time spent doing a placement is invaluable. The best way forward is to just do what you can and see what happens.