I know a lot of people will disagree and go crazy on my post but:
A race change option for a given "x" amount of dollars could be nice.
It is a an option that people will use a single time because they want to change their race to get the best passive for the type of character they want to play. And it'll provide you with a nice income in top of subscriptions fees to implement more things in the future or invest this money in other aspect of the game that could be improve.
I'd be the first costumer to pay you this "x" amount of money to change the race on one of my character.
Other games implemented it, why not you?
Light You Up
Member of Alacrity
World rank #1 Trials timers