Varying the rotation speed

Spend more time showing the screen and less time showing the back of the device.

Divide the turn into three moves

1. Choose whether the turn belongs to the Camera or the device's Movement track.
2. Make a first move from a front view toward the side.
3. Make a shorter middle move that passes the back.
4. Make a final move from the opposite side back to the front.
5. Adjust the blocks' durations until the screen-facing portions have enough reading time.

For a full turn on one rotation axis, 0°, 90°, 270°, and 360° are useful endpoints. Check the direction of travel in the actual scene.

Smooth the joins

Try Ease In for the first move, Linear for the middle, and Ease Out for the last. Preview the boundaries: a slowdown at every join can make a continuous turn feel like separate steps.

Keep all three moves on the same track so you can reason about one object's motion at a time.