The "is the WC title better than the WR?" comes to my mind. Unlike in more popular sports, in cubing a WR is by many people considered better than the WC title; shouldn't we try to change this?
This is an interesting point, but I think cubing is just not the right sport to have a single competition be the most important thing. Cubing has a lot of randomness in it; someone like Feliks can get a 8.65 average one competition and a 6.54 average the next. Imagine Usain Bolt doing an 11.6 100-meter dash one competition and the next time doing a 9.5. Even if the best cubers are all there and performing at top game, times will be all over the place, and just as it is now, winning will be a competition of being fast and doing well by your own standards. And there are always lockups, pops, nervousness, and so on. You can look at the finals of the recent US Nationals competition to see how easy it is to be off your game at the big moment
It's also just impractical, but maybe that's more a factor of the current popularity of the sport. What I mean is, even if you CAN get all top people in one place (which is hard enough - a lot of top cubers are teenagers or poor young adults who do this is as a hobby, and don't have any kind of sponsorship, never mind the kind of income from cubing that would let you avoid other work), you can't guarantee they can really concentrate on going fast. Maybe someone is worried about that big test in two weeks, or their hotel room/roommates make it hard to sleep, or they want to go out drinking with a good friend they haven't seen in person in years. You could say this is a problem of organization, or you could say it's a problem of individual cubers just not having the money to make cubing their priority.
I'm starting to think (again) that a WC every two years is not nearly enough. Now that we add a 4th continent to the rotation, even in the best case, someone is going to have to wait at least 8 years between comps in their continent. Cubing evolves incredibly fast and 8 years is an extreme amount of time - even in 2 years, so much can happen. I have seen people start cubing and in less than 2 years become good enough at an event (or even at 3x3x3) to have a serious chance against the top people. 4 years might work for the Olympics, but that's a multi-BILLION dollar event with tens of thousands of competitors and millions of spectators, lasting weeks - and almost all those sports have other championships. This is an event with several hundred cubers and very few spectators, lasting maybe 3 days. We could do it yearly, and maybe follow a tennis model (a schedule of world championships in different places, all prestigious enough for a title to mean something) or a distributed model (hold Worlds every year, at several venues at once, and people can attend whichever they want). Of course the organization will be harder
EDIT:
I'm pretty disappointed with the direction of this thread right now. I think a hella lot of people are forgetting the fact that just because it's inconvenient for you, it is not inconvenient for everyone.
Actually, it is inconvenient for almost everyone

That's the whole point I was making with the top 100 3x3x3 results. For top100 cubers, a Brazil competition is inconvenient (=not in the home continent) for 99% of them whereas an Asia competition is inconvenient for ~70% of them. That seems like a big difference for me. Imagine going out for dinner with all your friends, and choosing a restaurant 99% of your friends hate when you could be picking one that at least a third of them are happy with. I do care about Asian cubers who may have a lot of skill but no money to travel to South America. Especially Chinese cubers (remember, 1 Asian WC). I'm getting a $2000 range right now on Kayak for Beijing to Sao Paolo round trips; nominal per capita GDP in China being about 1/8 of that of the US (see
here), that is a LOT more money for a Chinese cuber than for an American or indeed a lot of the people posting here.