The tent stake "trowel" is what I use. 0.9 oz., and it can do double duty as a spare tent stake. If I didn't have to bury my dog's leavings as well as mine, I might go without. Since it's also used for my dog, he gets to carry it!

The one item on which you could save significant weight is your pack. My shoulders are very pressure-sensitive and I cannot use a pack without load lifters--which is why I avoid Gossamer Gear packs. I would think that so soon after surgery, you'd be in a similar situation. You might look at the Six Moon Designs packs, with the "optional" (mandatory, IMHO, especially for the load lifters to work) aluminum stays--I believe the newer Starlight is 30 oz. (I have their now-discontinued Comet.) SMD packs are on sale right now! You'd save a pound and a half with the Starlight. ULA is also a good source, although heavier. Their Catalyst would save you only half a pound, but it's an excellent pack.

Hopefully you're bringing some kind of light? Or did I miss it?

The other place you could save some weight is your sleeping pad. However, you might want to wait until several weeks after your surgery to decide that one. You might need an air pad for your shoulder to be comfortable (blow it up only about halfway so it has "give" to it). There's always the NeoAir--I didn't like it, but if you aren't already using a 2.5" thick air pad, the NeoAir would be more comfortable than what you have.

Minor stuff: Tooth powder instead of paste (I use baking soda, dentist recommended). Skip the soap since you have sanitizer. Platypus water containers are the lightest and stow the most compactly when empty. I've been told you should have 1 gallon water capacity in the GC? Two 2+L Platy bottles weigh 2.8 oz. Consider just 1 set of extra socks, since they'll dry really fast there.