RDM had Cure V originally it was removed.
After RDM replaced WHM for such a long time I suspect SE doesn't really want to give RDM Cure V back now WHM is the healer again, that said come 99 RDM will have the same Cure spell as every other mage /rdm I would hope SE will decide that they should have higher, though every mage will also have Haste /rdm and no way will they give a higher haste.
