Originally Posted by
Battlecat
No, subjobs are an FFXI mechanic only. And since people seem to be having trouble comprehending this, or just refusing to actually read the wealth of information we already have:
Leveling multiple classes will still be important as you can use skills learned from them on other classes. Each class has specific abilities that only that class can use, but others are classed as Disciple of Magic or Disciple of War or both and can be used on any job once you've reached the same level with the second job (example: you level Lancer to 5 and learn Skewer, you then change to Marauder and when you get to level 5 on Marauder you could also equip Skewer). You get 20 ability slots and a certain amount of action points, each ability is worth a certain number of Action Points and once you reach the cap you can't equip any more abilities. It works almost exactly like Blue Mage from FFXI in that respect. SE has also said that certain abilities will jive better with certain classes than with others. Obviously Mage spells are going to be more effective with other mages, but it sounds like it may go a bit deeper than that. (the rest of this is random speculation btw) For instance, trying to skewer something with a giant axe might not work so hot in practice, while it might work fantastically with a pointy tipped weapon like a sword. Anyway, that's the job system in a nutshell so far.