To me, the Worlds are like a 6th monument. Each type of rider is capable of winning a monument as long as they're good enough. Sprinters can win Milan-San Remo, pure climbers can win Lombardia. Rouleurs have RVV and Roubaix, puncheurs have LBL, and therefore so it should be with the Worlds. Nothing more immediately mountainous than Lombardia (after all, puncheurs can - and do - still win that) and nothing more obviously sprinty than San Remo (after all, people like Cancellara and Gerrans have won that in recent memory).
The Worlds are also usually 250+km, too add to the difficulty and give a sense of elite competition. They are theoretically to judge the best cyclist in the world. Therefore it is ridiculous if the competition is less challenging than your average Tour de France flat stage, and unless the wind really takes the competition apart, we end up with an even longer Scheldeprijs, the race that only exists to injure people.
To be "the best cyclist in the world" I expect a bit of versatility. Cavendish, for all the criticism he takes, has that, he just didn't need to use much of it to win in København. But Doha is going to be even easier. What if somebody who climbs like Guardini, Napolitano or van Hummel were to win it, which is always a possibility with the potential for crashes late on? How embarrassing would it be to see the rainbow jersey going off the back in a 1km climb in the Tour of Turkey?
Geelong was an example of how to get a sprinters' worlds absolutely right. Zolder was an example of how not to.