First of all, this feature is sufficiently buried that when I looked around for it a couple days ago I was convinced that it simply didn't exist (though honestly it's not that buried, it's just not where I would expect it). It didn't allow me to download my information, it said I should receive an email when I can (it's "gathering") and after 25 minutes the email hasn't been sent. Honestly, even if the zip has exactly what I want in it, that is an unacceptable experience.
I created a yahoo account just so I could link it to my facebook account and export the contacts from yahoo. If linking to a third party and exporting from there is more straightforward than exporting the data directly there is something seriously wrong.
Secondly, I only want my contact information, why can I not get just it? If I was on a limited bandwidth connection or I had to pay per byte in particular it is completely absurd that I have to download everything that I don't care about to get what I do care about.
There is also the point that the facebook experience feels adversarial for some things. Sure they had almost exactly the same feature as Circles for a long time, but how many people ever used it? When I was using it it feels more like some VP at facebook was like "I guess we have to include this feature, but it will hurt our bottom line if too many people start using it so we should make it sufficiently complex and buried that no one uses it while still being available so that if anyone complains about the lack of security features we can point at the fact that it technically exists". Exporting data seems to have followed exactly the same line of thinking.
My last comment I will be unable to actually confirm until I am able to see what they are exporting, but if it is not in a format that I can import to gmail contacts (it supports several formats from major vendors) then it is worse than useless to me since it made me waste all this time to get something that isn't in a usable format. I'll update this comment either way when I am able to actually access the information that I requested.