Originally Posted by
northernsky
That would take us a step closer to the phys. level that they just abolished
How is that? People don't know what abilities you have learned, still they require you to have sentinel for Ifrit, for example.
That said, being able to change title only, say, once a week, with a cooldown between "uses", as you seem to suggest in OP, seems fair.
Having strong restrictions (could even add a bit of randomness here) would make it work more like a real bonus, instead of another stat management tool that is needed, expected by the player base