"Two cents" worth of suggestions:
spare shirt - Icebreaker 150 (4.5 oz)
Old Spice (.5 oz)
Substitute (if cooking for just for 1 or 2):
alcohol stove (.57 oz), platypus w/alcohol (10 oz), esbit tab backup (.5 oz), and ulc caldera cone that fits the MLD pot (1.3 oz) instead of the MSR Pocket Rocket (3.0 oz) and the Isobutane cannister (8.5 oz).
wool liner gloves (Icebreaker or Ibex at 1.0 to 1.5 oz)
waterproof shell mittens (see MLD at 1.20 oz)
micro-dropper bottle w/liquid soap (0.5 or 1.0 oz)
map in ziploc (1.5 oz)
compass (1.0 oz)
golf pencil (0.1 oz)
waterproof paper (0.2)
critter protection re food/toiletries -- cord? Aloksak odor-proof bag? hang sack? (3.0 oz or so)
Include in pack weight:
Any stuff sacks -- sleeping bag? spare clothes? (<.5 oz ea)
The heavier rain gear you noted above is a good idea. It was my experience in a late summer trip to the Winds that weather can go (in the span of a day, and quickly) from bright sun and blue sky to hard-driving rain, to sleet, to hail, to snow, and with a lot of loud (nearby) lightening stikes and very strong winds.
Since you list a "t-shirt" as the shirt worn, that wind shirt (helios?) might still be good to include for sun protection if your heavier rain jacket is too "heavy" for comfortable hiking in sun. I wear a lighweight long-sleeve shirt (Railrider) for sun protection while hiking, and its pockets are nice to have available, too.