Being able to change from current races to new races should be a must, since those races were not available before. It should be done for free without question when 2.0 launches (well when they add the races).

However, changing from current race > current race, would be a perfect opportunity for SE to make a few extra bucks off FFXIV. I'm sure there are a handful of people who are indecisive on what they want, and would spend 20$ to change their race/gender since they are not happy with their current one. I wouldn't mind the option for free either, just saying race changes seem like one of those things that you can tack the extra service fee to.