Aren't Blue and Andrew Lloyd Webber well known though? Half the reason why we picked Blue is because we thought peopel would know them. Let's be honest, we wouldn't listen to that Hump song in this country (well, you know what I mean) so why would anyone else like it? That's the issue. You can tell from the quality of Sweden's entry that they didn't sit there going "hmm, those funny Europeans will like this", instead they went for awesome.
Sweden's victory tells us that the trick is to enter a good song with a good performer. We do need to get rid of the stupid "we didn't win" sulking though. And you're right that we shouldn't just turn to a well known hand.
And let's be honest, if you're going to send in an elderly geezer who can't sing all the notes then you do it right and send in Sir Bruce bloody Forsyth.