I find this to be an interesting problem for many reasons, not the least of which being that our countries share many similar environments. But the first question I would have is what is this bag intended for. Combat? In this case ammo and first aid would trump almost any other consideration.
You say survival, but you also say that you live in a generally well developed and well populated area. So cardiac event or joint injury seem to be the most likely cause for you to spend an unscheduled night in the bush. If this is true then I would think that for me a smartphone and first aid kit would edge out almost everything else.
This past Christmas I made up four survival kits for friends and family. I asked myself that regardless of circumstances, and excluding other resources, what would I want in my survival kit if I had to spend a night in a hole. I looked at my own gear, and modeled their kits after mine. The environment is urban to wilderness, Their ages range from 12 to 55 years old, and the skill levels are from novice to expert. This is what I came up with to meet my needs, this is what I have used for years, this is what I supplied to loved ones, and this is what I recommend to others.
1 large soft molle admin pouch with 1 45 gallon drum liner, 1 Mylar survival blanket, 25 feet 550 paracord, 12 feet nylon mason twine, 6 feet -30 degree duct tape, 1 roll 1 inch white hockey tape (there's a lot of first aid in a roll of hockey tape) 1 4 inch Israeli bandage, 1 4oz lifeboat water pouch, 1 Clif bar. There is also 1 6 inch by 4 inch by 2 inch aluminum box with lid containing: 1 Ziploc sandwich bag with 1 sheet A4 paper and 1 4 inch HB (#2) pencil, 2 squares paper towel, 1 self adhesive elbow/knee bandage, 3 30mm x 3.5cm self-adhesive bandages, 2 benzalkonium chloride wipes and 6 easy-swallow extra strength Tylenol, a small Ziploc snack bag with 1 bullion envelope, 1 tea bag, 1 complete serving pack of instant French vanilla cappuccino, 2 envelopes of sugar, 2 envelopes of salt, and 2 tootsie rolls, also there is 1 oven roasting bag suitable for a medium chicken, 2 water purification tablets, 1 box waterproof matches, 1 tea candle, 1 snap light, 1 3 inch single-hand opening locking knife, 1/8 sheet fine emery paper, 3 1 inch safety pins 2 large sewing needles, 1 bobbin 30lb braided spider line, 6 small hooks, 3 large hooks, 1 lure with treble hook, 1 5 gram weight, 1 wine cork bobber, 1 8 inch artificial worm, 2 2 1/2 inch galvanized spiral nails, 1 3 1/2 inch galvanized spiral nail, 1 single use tube of super glue, 6 feet of 20 gauge brass wire, 1 small signal mirror, 1 compact Fox 40 whistle, and one button compass. I also recommended that the recipients include 40 dollars in assorted small bills and change (not much good in the woods, but awesome if you walk out and come across a store).
Again, this is what I use, supply and recommend. I see that we share some similarities, but I also see that we have some significant differences. I am really impressed with your choice of knife, and the inclusion of Esbit tabs. But you are seriously light on first aid. I assume your first aid kit is in your main bag, but if you wander off from camp and twist a knee you will want to have stuff on you. Believe it.
Happy Trails!
