I doubt they're going to touch subjobs given recent adjustments to Storm spell level reqs.
Probably my final concern with progression once they finish up is the JP grind. Sure, RoV may add another % KI as well as another RoE objective or two, but 2100 points is a hell of a grind and most definitely subject to the usual job discrimination that's gone on throughout the game's history. Long as it took me to break 100 without being pimped in up-to-date gear, multiplying that exponentially just makes me groan.
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