More reach is usually good. You should look at the angle between your upper arms and torso when on the hoods and in the drops. Both should give ~90° angle. If you're close to that, you're good. Set up a mirror so you can see yourself, hopefully on the trainer.

What's probably changed is that your new position denies activation to some of the muscles you've trained to use in your old position. New muscles may fill in for them as you train in the new position, or maybe not. It's possible that to use the new muscles effectively, you'll have to move your saddle. Only experimentation can tell you.

Also use the mirror to look at your back. Your pelvis should be rotated forward so that your lower back is as straight as you can get it. This will take the curvature out of your upper back, which will make it easier there and on your neck. http://www.bikeforums.net/road-cycli...discovery.html