Dave, Nice list indeed. I think you will really enjoy your warm weather trips with a sub 5 lb base weight. I might have missed it, but what are the min and max temps you expect.
Here are misc comments/thoughts....
* do you need BPL tights if min temp is >40?
* instead of LS T you could take a Montbell down inner, you would actually save weight and add a nice insulated piece.
* as pointed out a dri ducks jacket would save several ounces over current rain jacket (this is my summer jacket). Also it can be used in morning to keep your arms warm allowing you to take just a SS T.
* Im guessing you are sleeping in the LS T and tights. If so then you might want to leave as is. I don't change clothes, saves time and weight.
* didnt see any stakes or line for the tarp, weight appears to be same as mine without these (i use the same tarp). Line and stakes will add 2.5 to 3.5 oz.
* bugs might not be an issue with you in summer, I use a MLD bug bivy. This would add about 5 oz over your ground sheet.
* med kit looks good, duct tape wounds, pill for anything else
* micra looks like overkill. I have found the swiss army classic (.75 oz) to be a great compromise. I have cut myself on razor blade knife so if clumsy like me this might be a good route.
* I did not see any extra socks...I have found that extra socks are really nice. Not really needed for an overnight trip though
* I go without drinking tube, but add a 1 liter platy with drink top. Its lighter and increases water holding capacity. I have found I can go through 3 liters of water in evenings.
* I prefer tablets over aqua mira in bottles, just depends on what you like
* The litemax is a real treat to use so you might stick with it. As it has been pointed out the compact caldera cone for your pot would be a lighter option and allow you to carry less fuel or just bring a few esbits.
* didnt see a map, not much weight if you photo copy and keep in a ziplock. You might not need a map
* The arc edge is going to be one tight bag for summer. It is extremely designed to save weight, but still keep you warm at reasonable temps. If you can be comfortable with a 32 inch footbox in summer then you are good to go. Another option is customization adding a few inches to footbox. I have a ghost and adding to inches to it, 36" footbox. A third option that I use is a JRB sleath quilt for summer. It can be laid flat like a blacket, is wider (48 inch foot box), can be worn as an insulating layer (poncho mode), and it can ship quickly. It would add 4 oz. If you drop the LS T and tights you would save weight.
* the neo air is comfy I'm sure, not sure how well you can use it to frame out the burn. Even at 5 lbs I want want a pad to add some structure. A 3/8" closed cell pad cut to length of neo air would save about 5 oz and work great to frame out pack.
Again great list, my comments are more opinions then anything else. Enjoy the hike.