I’ll grant you more weight for lighting than others – the ability to hike into the night or before daybreak to beat the heat might be an important option. Last month, I started a hike down the South Kaibab at 4:30 am and a really minimal little light was plenty of light.
But skip the Mora. Nice knife, but there are no trees, no firewood to prepare, no fish to fillet and no bears to butcher. A Victorinox Classic is 21 grams – 0.75 ounces. And has more tools on it (scissors are safer to use on Luekotape or food packaging than a blade).
I haven’t checked if 5+ liters of water is appropriate for that route. Respond to the weather forecast and be ready to get up WAY before dawn to get miles done early in the day.
The popcorn tin (which I keep promoting) isn’t light, but sure does give care-free food storage and avoids you having to police against squirrels and ravens all day and all night long.
I see a mini-Bic, but no stove. Either you are taking a stove, or you don’t need the lighter (unless maybe for sterilizing a needle to pop a blister(?). While in other areas, a lighter can start an emergency fire, that doesn’t help in GCNP.
I don’t get any cell reception even at Indian Gardens or on the Bright Angel above until very close to the Rim. That’s a lot of electronic weight if just for tunes – which could be done a lot lighter with a tiny dedicated MP3 player.
Skip the poncho and remember that your tarp can be used as a poncho in a downpour (I’ve been in a few of those in GCNP). Likewise, I’d skip the wind shirt, be ready to rely on the tarp, but would consider a very light puffy if up and about late at night to watch stars or early in the morning to beat the heat. Or wrap yourself in your quilt for the first hour of hiking until you’ve warmed up.
I hate convertible pants – that zipper adds stiffness I don’t like. Lightweight long pants aren’t wrong – complete sun and bug protection and some warmth if needed, but I prefer lighter, more flexibly options.
I’ll often hike in a cotton shirt in the GC and soak it with water as I cross drainages. I find that cools me but isn’t as tiring as sweating out that same amount of water. You only have the two bandanas that will hold water easily. I mostly use one bandana to soak and keep it around my neck, rotating it frequently to move the outer, cool side against my skin.
Be careful of pointy plants and sharp rocks before you lay out your air mattress.
If you do bring the phone, download a sky-watching app such as SkyView. The constellations can be hard to recognize when there are SO MANY stars in the sky. I’ve also enjoyed the satellite tracking apps that tell you when and where satellites will pass overhead.