I would like to point out it would also be nice for if you accidentally mess up on your subjob. For instance I Dyna as RDM, sometimes I mess up when rushing to do Dyna, and end up going as /NIN, which basically ruins the entire run ofcourse.

I would say instead of saying anything about atma, it should be a bit unique. You can be raised normally for 3 minutes, however if you are not, then you are Auto-Raised, the 3 minute is a penalty for the death. I would say perhaps you get a Sneak/Invis effect for 15 seconds as well, due to the crowding of mobs in Dynamis areas, and the fact Reraise would do you little good when you can be instantly killed by most mobs if they aggro & link, before the raise animation even completes and your weapons are put away. As for Reraise items, they would still have a use, as it would save you time by not having to waste that extra 3 minutes the Auto-Raise takes to activate.