Well, I'm a little late but I'll jump in just in case someone else has the same issue in the future. It's okay to leave the tree be. Simply avoid unnecessary root damage coz you could make things worse. Yes, teasing out the roots is crucial to a plant's growth but it's a 50/50 thing especially if you've already planted it. I mean, the roots are meant to provide the tree with nutrients by absorbing them from the ground. It's also the roots' job to take up water. Providing is only part of its role.
Because of the contradicting replies here, I'm not sure what you did, but digging it up only to tease out the roots might not be worth it. You've staked it for chrissakes, so the support part is already taken care of. Still, it's all up to you. Doing so might even make things better.
Another assassination attempt on Donald Trump
The main room in your house...


