As much as I would love to see dual Jobs off a single Base Class, it's probably not going to happen again short of a revamp from an expansion. That being said, I do like the idea of Fencer-> Red Mage as long as the get the right spirit of the Red Mage as a Hybrid Jack and not as a buff/debuff caster.

The problem with designing a Hybrid Jack in an MMO is that they can't really be a Hybrid Jack. MMOs can't have a spot filled by a class that does average dps, hps, and has average survivability in a healing or dps slot. Short of adding a fifth "Support" slot that they could be in, then we have to do a little kit-rigging in order for them to succeed.