I am not a huge follower of the World Cup, but I think the increased of countries being allowed to participate was a great addition. I mean, in the long run, it would eventually benefit football overall since it would give football players who aren't as privileged as others a chance to showcase their skills on the world stage and maybe be headhunted by known/popular teams.
Oh, come on, this is the World Cup that doesn't mean that you put each and every country in the main tournament and fail the purpose of it.
Also, this doesn't mean that small countries aren't given the chance to participate in the World Cup. They have the qualification rounds and if they are capable enough, they should qualify in the top 32 countries. If they can't qualify, they need to improve themselves.
This doesn't make sense that in order to include those countries, you increase the number of participating countries to 48. Some time later, people will argue that instead of 48, there should be 96 countries so everyone is given a chance.

Then why do we have qualifying rounds?