I think locking access to new Jobs is a HUGE mistake..

[Riardon]

There is nothing stated about the starting level of the jobs.

Yoshi said in an interview that the new Jobs will not start at lvl 1. He didn't say from what lvl they will start but he gave a hint that here we are talking about new Jobs and not new Classes. Which mean the new jobs will start at lvl 30 most probably.