Its extremely difficult for the dubs to get fridays off work.
Not really. It's just that they don't bother to try very hard. They don't want to waste a vacation day on it.
The last full DC that I went to, back in 03, I noticed that a lot of people were keeping their cell phones on, especially on Friday. Most of them didn't ring, but were either on silent or vibrate. You could look around the arena at any given time, see someone bend over to pick up a phone or grab it out of a purse, check the screen, get up and hurriedly run out to the concourse to either answer it or return a call.
So even those that came on Friday were staying in touch with their work, probably to save having to take a day off and shortening their other vacations.
Back to the topic...I read that same post about the possibility of the DC being eliminated. It would fulfill the modern day prophecy of this being the last DC that the dubs would be attending, but I don't see it happening myself. They need these "special" events to keep control over them and it does bring in some bucks.
Maybe they're going to change the way they operate them, or where they hold them. I could see them renting fewer bigger outdoor arenas in select cities instead of the many smaller venues in smaller cities. The attendance looks pretty bad when you've only got 8,000 people in a 14,000 seat coliseum when just a decade or so ago, you could almost fill a 20,000 seat arena. So, to make it look like there's an increase, and to make the dubs work harder to attend, thus keeping a level of control over them, you send them all to the big city baseball/football stadiums, fill them up to capacity and everyone comes away thinking what a special occasion they were a part of. And if it plays out right, the attendees give more money because, darn it, they announced how expensive these places are to rent and we have to do our part to support the Kingdom work.
They drawback to that: more and more JWs are making less and less money, thus making that kind of travel a hardship and even if they make that trip, they can't afford to donate much. But that's never stopped the WTS from making them feel guilty for not making the ultimate sacrifice to attend.