Isn't this the curse of pretty much all science fiction/fantasy though? The use of cheats and get out causes, the fact that characters rarely die and stay dead. Sometimes I almost understand why the mundanes can get so dismissive of the genre. *
At least Who has the decency to throw the odd knowing wink at the audience, "we know this is guff, you know it's guff, but just ignore it and enjoy the ride". I realise that isn't perfect but damn its preferable in my view to something sniffy like Nu BSG "Oh we'd never pull that kind of crap." and then they do...
*Although in fairness regular TV pulls this kind of crap all the time, we just notice it less.
I do think Who needs to show a bit more internal consistency, and drop some of the timey wimey stuff (and I think they have this year) but I don't want it to ever be so constrained by rules that it ceases to be fun.