As pointed out, this won't happen because it would make zombieing too easy.
Pretty sure they dropped the cooldown on Lucid Dreaming to help people combat this problem. I feel like that's already enough of a kind gesture in this regard.
If getting up without Lucid is such a problem for you and it's a situation where you'll be more of a liability than actually useful until you have your next Lucid, then simply wait for a bit before accepting your raise.
Also to RDMs out there, don't forget that you have an unenchanted melee combo you can use if MP is too tight to cast offensive spells for whatever reason. TP cost isn't even an issue anymore, too. Sure, it's weak, but it's probably comparable to standing around not even being able to ride your gcd/dualcast because your MP is gone.