With all due respect and with loving kindness. My harshing of your kit:

1 military fanny pack - Substitute a lightweight nylon civilian version.

4 foil water packets - Eliminate. If the area really is truly dry, most aren't, substitute 2-12oz bottled water. Half the cost and twice the water. these can also allow you to eliminate canteens.

2 FirstStrike Ration milkshake pouches (325 Calories/ea) eliminate or substitute power bars.

Platypus collapsable 1-qt bottles - Good.

a few handfuls of TP - Good. Quarter roll TP flattened. Keep core in as this gives you cardboard to burn or act as footbed.

A small FAK (bandaids, motrin, tylenol, Neosporin ointment)- Drop Tylenol and add Imodium. Nothing is quite as debilitating as diarhea.

1 River Rock AA flashlight -
1 Proton AA flashlight - Pick one. Drop the other. Insert lithium batteries to get better performance and lower weight.

4 AA batteries - Eliminate. With lithium run times will be long enough that replacements are not necessary.

1 match case with REI storm matches. Eliminate. Flint is listed lower down. A mini-Bic is more compact and it has a lot more lights.

1 Byrd knife - OK.

1 double head screwdriver, with duct tape along handle. If you carry a multi-tool you can drop the screwdriver.

1 lightstick - Eliminate. You already have light sources.

20 ft paracord, 20 ft of mason's line, some zipties - Drop the zip -ties. Mason line is redunadant but acceptable due to extreme light weight.

Coffee filters, 6 aqua-pur tabs (the non-iodine type), a plastic knife and spoon - Drop the coffee filters. Use a cotton bandanna if the water is chunky. You have a knife so eliminate the plastic one. The generic plastic spoon is OK but a lexan spoon or spork is more durable.

1 "fire kit" - tinder, matches, cotton balls - Substitute tinder paper at half the weight and bulk.

Here's the main BOB. The black pouch on back is a FAK, the small black pouch on the waist belt is some quick-access snacks. It's a CheaperThanDirt Molle bag.

Opening the main pouch, there are 2 "sides" (the back, and the rest of the pack). This is what's in the pouch directly behind the shoulder straps:
2 wool blankets, wrapped in trash bags (clean and dry)- Substitute one poncho liner. Half the weight and bulk.

2 civilian MRE meals

2 Mainstay 1-day rations

Pocket size SAS manual - Read the manual and memorize the important parts. Leave the book behind. In the field and in an emergency is Not the place to be reading the manual.

1 small nalgene bottle with photocopies of ID, 20 aqua-pur tabs
Pouch with military poncho

1 shotgun round belt, with: 5 rounds of slug, 5 of 00 buck, 15 of #4 birdshot - Skip all that.

1 REI 2-gallon (?) water pouch - Ok.

The facing side of the pack:
2 dehydrated meals
1 6-pack KoolAid mix - Eliminate. Drink water.

2 Gatorade mix pouches - Eliminate. Sub two sachets of rehydration mix.

12 Trioxane tabs -
box of 12 Esbit tabs - Eliminate. Build a fire or do without.

100ft paracord - OK.
coffee filters - Eliminate.
1 pack of wetwipes - If small and light OK. Else, sub a washcloth and water.

4 45-gal trashbags - OK.

The FAK has gauze, gloves, a few ace wraps and gauze wraps. No big suprise. The food pack has a powerbark, 1 pack of Cliff-shots, and some sesame crackers from REI. There are 2 small pouches on the sides of the bag. One side has a 1-gal USGI canteen and canteen cup. The other has a 1-gal USGI canteen with duct tape around it.

On the back of the pack are 2 pockets, on top of each other. The larger carries:
1 RiverRock LED lantern (3AA), with 3 spare AA batteries - Eliminate as redundant.

2 rolls of TP - Eliminate. You have TP.

1 gal. bag with: 1 pr wool socks, 1 pr cotton socks, 1 pr wool glove liners, 1 fleece hat, 1 pr. boxers
1 P-38

3 lightsticks - Redundant. For backup you might add a Photon keychain light.

1 Albuterol inhaler OK as I assume you require this.

3 packs of plastic eating utensils - Eliminate. If you have company they can share your Spork.

Some tin foil

2 1-gal ziplock bags

50 rounds of .22 ammo - Skip.

1 pack wetwipes - redundant.

The small pouch outside of this pocket is fairly snug. It contains:
1pr leather work gloves
1 small hatchet
1 headlamp (not AA, but such is life) - Eliminate or substitute a Nite-Ize headband that allows use of small flashlight, listed elsewhere, on head.

The bottom outside pouch is rather packed. It has:
1 Paraframe knife -
1 SOG multiplier - Pick one or the other knife or multi tool. Total of one moderately sized knife or multi tool. One half size or small SAK as backup. One tiny pen knife or similar kept razor sharp for first-aid use and third.

1 sharpening stone - Eliminate. Substitute a pen-type diamond sharpener. Or a piece of silicon-carbide wet-dry paper glued to a flat surface. Something you already carry is ideal. A paint stirrer is also good.

1 Esbit stove with 6-pack inside it - Gone.

10 back AA batteries - unnecessary.

6 pack of KoolAid - Get used to plain water.

1 chapstick, 1 hotel-size mouthwash, 1 hotel-size shampoo, 1 hotel-size soap bar - Keep the chapstick toss the rest. Sunscreen type chapstick is best and add a small tube of sunscreen.

4 oz contact lens solution, 1 contacts case - With blowing dust, smoke or allergies you may not be able to wear contacts so add glasses in indestructible birth control frames. Flip-down sunglasses on them add functionality.

1 firesteel - Already mentioned.

5 9-hour candles - Carry one. When it gets dark you sleep.

1 altoid tin of drier lint - Eliminate. You already have tinder.

5 paper matchbooks in ziplock bag - Redundant, gone.

Well, I hope that wasn't too painful. Just my considered opinion. YMMV.