The "reversed" edit of the theme sounds great as it is, I think. Well done.
BBC is more likely to speed up the scrolling credits to match a shorter closing theme.
Judging by the recently released soundtrack album, I think a lot of Murray Gold's music is actually quite good.
The key is that he, the BBC, and the National Orchestra of Wales (as good as they are, and they are good) need to stop tinkering with the music every few episodes. Then you'll see positive progress.
