Looks good, the only thing I might add is some kind of compact water bag (probably MRE beverage bags if you can find them, or a turkey bag- an empty bladder is still too bulky) and maybe a flat of chlorine dioxide tablets. Maybe a compact spark based system, like a Sparklite.

The only thing I really don't like is the mylar blanket- the heatsheet bivy would be about the same size and lot more effective, although you might have to shuffle some things around.

Oh, and two heads ups:
-Your duct tape is looking a little punked out, how long has it been in that bag?
-Check the date on your lifeboat matches and protect that striker on the top. They don't last much longer than their "best by" date in my experience, and the proprietary striker is prone to be worn off.
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-IronRaven

When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.