The problem with constantly adding "something exciting and new" is that at a certain point you really do have to stop before you start making the jobs worse. We are four expansion in and some jobs already feel pretty "complete". And I'm willing to claim that Red Mage is at that point - it's a very well designed job. ShB Red Mage had one glaring weakness - AoE - and it was adressed thoroughly in EW.

I don't see much you can do without upsetting the balance of current RDM. Ading another inconsequential "charge" that plays itself to the gauge isn't "new and exciting" - it's the very definition of bloat for the sake of bloat.