+1 on the rain skirt. Much lighter and easier to put on. Plus you can use it as a ground tarp to place the backpack and other items during packing an unpacking. I would’t bring an umbrella.
I like your list, very similar to mine also, except I have the duplex. A hat for the sun is highly recommended.
Are you going alone or with others? If others, you may want to change out the Sawyer mini with the regular with a gravity fed system. The regular is less prone to becoming slow and the gravity feed will allow much faster filtering, 1 L/Min as opposed to 1L/5 Min.
I didn’t see maps. You really won’t need phone for GPS as the trail is well marked, but it is fun to use. The maps allow you see so much more of the surrounding area. The Tom Harrison maps work great for this.
For the Triplex, lengthen the guys with 36″ guy line extensions with micro-locks. This will allow you a lot of different options when above treeline with hard soil as it allows easy use of rocks in lieu of stakes..
For the cooking system, you may want to considered a Trail Designs Caldera Sidewinder Cone, 0.9 Evernew Pot with the Zelph StarLyte alcohol stove. Easy to use, can’t really fail unless you step on it, and easy to pack.
For the gloves, I’d recommend also bringing Zpacks rain mitts. For me these have come in very handy to keep my hands dry during thunderstorms.
I agree with Matt on the Bearikade, much lighter than the others and the resale value is great.
K