Hey there, Jaymonius here with some more Phantasia VX information, and plans I intend to implement into the game! :D
At a point in the game, you will unlock sub-element. Which will allow your heroes to learn new spells and passives! (If you played Phantasia Remake, it will be at the point where you will obtain the Element Orb.)
Each of the elements will be like a class each hero can go to. And then when fighting under that element, you will eventually learn new spells and passives.
Each element will have its own focus on certain roles, such as buffs, debuffs, damage, etc.
The spells, skills, or passives you learn will also allow you to equip them. However, you can only equip 8 spells, skills and passives at a time. So choose wisely on what you want your heroes to learn, and what you will want to assign them as.
While the heroes will learn spells and passives through the Sub-Element system, they will also learn their own EX Skills that they will possess alone and can not be learned by anyone else. Also, each spell/skill will grant stat boosts as if they were like equipment!
It may feel limiting in terms of being able to use only 8 spells, skills, and passives. The enemies will also have to follow these rules as well. So you won't have to worry about enemies having a large skill pool. It'll make it easier to learn their attack patterns.
What stuff you learn is still in a major development, but the groundwork has been laid out. So it's something to look forward to at least.
Hope you enjoyed what will be in store, see ya again. :P