What's the benefit of converting Firefall crystite to credits?

I've been playing the Firefall beta for a while now, and have amassed a large amount of crystite. I read in the patch notes that the new currency is going to be called "Credits" and you can convert crystite into credits (with a daily conversion limit).

However, when I logged into the game, I found that my repair costs were charged in crystite and not credits.

So I'm confused. If credits are the new currency, why would I have to pay for repairs in crystite? Should I convert all of my crystite to credits?