Final Fantasy XIV revolves around character growth. There will be no experience points or leveling system this time around, and a new system will come in to play. Square Enix wants to deliver an experience where new players have the freedom to try out any quest and many different things, growing naturally from their experiences. They want players to enjoy the process of character growth.
The main idea for Final Fantasy XIV is to provide freedom of growth through the variety of quests offered. However, players can meet up with friends and set off on adventure or they can play solo. Players won't be left with nothing to do, bored.
Square Enix is considering large scale battles, however, regular battles will be against single enemies. During quests you can gather parties and fight against multiple foes.