Sounds like a great kit. The only suggestions I would have are:

1) The 6 MP1 tabs are going to run out very quickly if needed. I would add a bottle of Potable Aqua tabs in the bag. These are cheap and pretty small.
2) I didn't see any mention of a small LED flashlight.
3)I would opt for the Acme Tornado whistle over the ACR whistle for the same space since it is louder (according to Doug's tests).
4) If you can't squeeze anything else in without removing something, you could reduce your cord supply. I would also include some braided nylon string in addition to or in place of some cordage. It is handy and compact.
5) I like the idea of having a pocket kit as a component of a belt kit, but I wouldn't put the pocket kit IN the belt pouch. If you can carry it seperately in your pocket all the time, it will more likely be on you if/when you need it.