Hmm... It already does a lerp, but it's constant speed. The look-ahead code offsets the camera in the direction of movement. When you stop moving (or flip direction) along a specific axis, the camera tries to ensure you're not left staring into an area that's no longer of interest to you. I'll have a play and see if I can do something softer.
[Edit: just made a change that might fix it for you. Check out the next release when it comes up.]