Hi Sue --
How great that someone who has been sewing as long as you have has found yet another reason to love sewing. I have also been sewing for well over 50 years, and only discovered quilting when I retired. Since I no longer needed all the clothes I was sewing, quilting came along (Thanks to Georgia Bonesteel and Alex Anderson) to keep me learning new things and building on skills I've had forever.
Regarding the use of the stylus, I've never really used it. I did some experimenting with it, but found that it was more trouble than it was worth for my purposes. The laser has come in handy a few times, but it's not a feature I would miss. I really like the stitch regulator. Having said that, after doing a lot of experimenting, I don't use the round disc part (can't remember what it's called) that you tuck under the fabric when free motioning. I guess it's supposed to keep track of your hand speed, but I found it cumbersome and just another thing to keep track of. So, after setting up the machine for FMQ, I just set the stitch regular to a speed I'm comfortable with and stitches per inch and go to it. It still takes some practice to find the combination of speed and number of stitches to get it right, but the regulator let's you just concentrate on your hands. Once you set the speed, the machine won't run away with you no matter how hard to press on that presser foot. One less variable to worry about.
I've also had experience with the Bernina stitch regulator. For me, the Babylock stitch regulator was more dependable. I'm convinced, however, there is no real short cut to learning FMQ. It still takes practice, but a regulator helps a great deal. You have to be sure to follow the set up directions carefully, plugging in things where they are supposed to go. I speak from experience. When I first got my machine, I was so excited to try the stitch regulator, that I didn't have the unit plugged in properly, and couldn't understand why it wasn't working. Thank heaven, my dealer has a lot of patience with me!
Good luck with your purchase!