On the Loeb note, I've had a good, though none-too serious idea for improving motorsport as a whole - once a driver has won a championship, say, in Formula 1, give them one more year to defend their title and if they happen to win that year too (as Hakkinen did, and as Schumacher did), force them to move to a different motorsport discipline to try and win that too.
That way, Loeb would already be in something like touring cars by now, Schuey would have gone to rallying, there'd be some NASCAR driver in the WRC, Valentino Rossi would be doing the Le Mans series... you'd soon see who the real talents were - they'd be the ones who remained competitive whichever discipline you put them in. I'm still quite sure that people like Loeb, Rossi, Schuey and similar massively talented drivers would be right up at the front in other series if you put them there.