I don't think that the champion should get draw odds, and be seeded into the final. If the match system is retained, perhaps he could be seeded into the semi-final, so you don't force the champion to go through a series of lopsided matches, but still make him show his strength against at least two top players.
The thing I didn't like about Las Vegas, Tehran, Moscow and Tripoli was the fast time control and the short matches with blitz playoffs. Too many of the favourites got knocked out early on, or refused to even play in the first place.
For San Luis and Mexico City, FIDE lengthened the time control, and made it a round-robin, so each player had a chance to recover from a bad game. Most people seem to accept Topalov and Anand as world champions.
I hope Carlsen does push for some change. The special rights that chess champions enjoy do seem to be pretty rare in the sporting world.
By the way, Carlsen must have a match, head to head, mano a mano, a gladiators fight with Anand (or another). I want to see him in combat. Must show if he's gonna be a real World Champion or only the higher rating of all times (this is only stadistics).