Whilst there's a gap that'd be nice to have RDM fill, saying there's no "real regen" spell is kinda oblivious.
You also have to take into account balancing. (Which FFXIV loves) If they keep releasing DPS/support classes without any new tank classes for example shit is going to crumble fast. Even longer DF times perhaps. :^(
Anyway, if your attitude is "qq i'm not going to play till a whole new class is released just because i want it", that seems a rather lame way to play a game on your part. You're going to be the one missing out whilst being blind to any other content released. You get me?