They're keeping Follow You Arrow for when she's a little bigger, they are building up to make it her signature hit.
I noticed that everywhere (her facebook, twitter, website, instagram, tour..etc) there are always arrows and it makes me excited for what they have in mind.
I don't think her team would let her release Follow Your Arrow because it's way too liberal and risky for country radio, I hope she releases My House after this. Good choice. I wish country radio would play FYA /: