Maybe give an option when picking up the new Jobs to start at either level 30/50 or level 1. I would have loved the option to have started my machinist and red mage etc at level 1 rather than being forced to start them at 30 and 50. I was completely overwhelmed by getting all the abilities at once rather than getting them one at a time by leveling up from 1.

But i also know that's not for everyone, which is why an option would be nice.