From the translation post from Stanislaw: Yoshi-P Interview Translation Project (4Gamer, GAME Watch)

Quote Originally Posted by 4gamer View Post
4Gamer:
Will it be possible to level up through PvP?

吉田氏：
　できます。ただしある程度のレベルがないと，PvPコンテンツには参加できないので，最低限のエオルゼアのルールを知ってからご参加ください，という感じです。それ以降はPvPのみでも，レベルは上がるようにしたいと思っています。
　その一方では，自分ではPvPをしないプレイヤーであっても同じ勢力のPvPプレイヤーを支援できる要素も入れたいと考えています。例えば，勝利側の勢力のみがアクセスできるコンテンツを用意するとかですね。
Yoshi-P:
Yes. However, you have to reach a certain level before you can participate in PvP content, so one must familiarize themselves with basic Eorzea rules before participating in such activities. Afterwards, we would like to make it so players will be free to level up though PvP alone.
Additionally, we would also like to implement features where even if one were a player who doesn't participate in PvP, they can support other PvP players who share the same allegiance. For example, content that's only accessible by the forces that had won.
Thank you for giving us another way to level up, PvP! To me, PvP is something that is always fresh. With monsters and bosses, you know what they do, they do the same things over and over, you know their abilities, you know when they use them. With PvP, you never really know what your opponent can pull out of their sleeve!

I have friends that simply would not touch this game as it had no PvP content, I know a few of them are pretty excited for the 2.0 reboot now, though!

I cannot express how happy I was to see this in the translation, but thank you so much for taking different types of gamers into consideration when planning out version 2.0. <3