Yeah, you are very close. From here it's a combination of details (ti stakes, squeeze LED light, Nightlight pad, lighter knife, cuben or spinnaker tarp, etc) to get down t the lighter weight and to include your other essentials. OR it's a big shift with your heaviest items. By that I mean a quilt and a poncho tarp. Using a quilt, you can drop 5 ounces and with little effect on your warmth with that bivy. But your biggest is a poncho tarp- ditch the 7 ounce rain jacket.
My sub 4 gear list is attached to my profile if you'd like to look at that- I've used lists nearly idential for a long time now and I'm comfortable with it. But you know, I think I'd give yourself that extra .5-1 lbs for your first couple of trips and then fine tune from there.
But if you're diving in, get a poncho tarp, ti stakes, and hit the road!