In these cases I'd like to enter the New Player's shoes.

Social Player
So many worlds! But I'd like to play where I can have fun with an awesome group of players, so I'd like a high-populated server. Who knows! Maybe I can learn so much from them about the game itself and sh*t. So I choose... [enter high-populated server name here].

Antisocial Player
That's a bunch of worlds! I've come in this game to play alone though, because reaching my objectives alone is what makes me a real Player. So I'll choose... [enter low-populated server name here].

In both of the cases, the new player wants to have a new FFXIV experience. It's the Player's choice to being spoiled of the things in Eorzea or walking its way to discover them by itself.

So, I can't see a point to have servers for new players only. It just segregates players in those servers without the option to have fun in high-populated servers. It defeats a purpose to have a big community of players that play with each other.