That's the exact reason why we need Reraise items... haha. But the dev team has said they had no intention of bringing them in unless new battlefields would nearly require them (think FFXI's Dynamis). That said, I suppose it's a possibility that some actions will be usable but others not. Maybe they'll have it so any abilities before level 30 can be used as thats the level they're thinking of having the job quests start. In that scenario Raise/Resurrect would still be equipable.