How to properly do Twin Stick shooter controls with an XBOX controller?

Pretty much what the title says, I was using this bit of code:

	void Update () {

        float leftStickx = Input.GetAxis("Horizontal");
        float leftSticky = Input.GetAxis("Vertical");

        transform.Translate(leftStickx * Time.deltaTime * speed, leftSticky * Time.deltaTime * speed, 0, Space.World);

        float rightStickx = Input.GetAxis("Right_Horizontal");
        float rightSticky = Input.GetAxis("Right_Vertical");

        float angle = Mathf.Atan2(rightStickx, rightSticky) * Mathf.Rad2Deg;
        if (rightStickx != sensitivity || rightSticky != sensitivity)
            transform.rotation = Quaternion.EulerAngles(0.0f, 0.0f, angle);
           // transform.rotation = Quaternion.Angle()

from a tutorial, but #1 EulerAngles seem to be deprecated, which is okay, but it still rotated my character, even if the sensitivity was crazy. So, how do I use the Quaternion.Angle with an XBOX Right Thumbstick so I can rotate my character and do it smoothly.

Thanks a lot for any help in this matter!

You would need to use Quaternion.Lerp.

transform.rotation = Quaternion.Lerp(transform.rotation, Quaternion.EulerAngles(…), rotationSpeed * Time.deltaTime)