Pretty much my opinion. The game isn't a year old yet, and we only have one case of one class branching off to two jobs. YoshiP isn't stupid, and doesn't seem to be the kind to be against breaking any pre-existing building blocks for the sake of making something better, or streamlining it.
Cross-class on jobs is so limited I wouldn't be surprised if they ditch that concept some day and just give the jobs similar skills as a result. Or giving SCH its own class instead of Arcanist so they can just drop the multi-job-per-class idea.
And we already have weapons that are job-only, so whoop-de-doo if NIN gets its own weapon type from a ROG.
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