This would be really bad idea at this time for a game that's trying to fix it's image and repair the damage done by a very bad first impression upon launch.
Can you see the press releases if they actually did this? ...
"Less than 3 months into it's launch, Final Fantasy XIV forced to merge servers .... Is this the beginning of the end?..."
Not exactly the message you want to send to people out there who are still deciding if they want to play this game.
That's totally irrelevant at this point, since they have extended the trial yet another month, and up to who knows when :) also they have changed the people in charge of this project, and have delayed the PS3 version yet Again! Which of this does not spell's out "Desperation?"
The best thing they can do is merge the server's and keep those that are currently playing with a good amount of population to group and do stuff with, instead of this ghost server's where pop is 700 at times