My comments thus far have been pretty negative, so I'll try to be positive this go.

Personally, I feel that adding limited jobs - of jobs that have already been created in other FF games that people are potentially looking forward to - is a mistake. If they were set on doing something like this, then do it with a NEW job. Don't make Blue Mage a limited job, make a brand new job that is limited instead. Leave the jobs that have a history as full jobs.

Or to offer ideas - make limited jobs non combat.

Auctioneer. Merchant. Farmer. Caravan Traveller. Performer.