Very good kit that.

I personally would add:

Lightweight disposable poncho to compliment the heatsheet.
SAK that has a saw on it to compliment minigrip.
A second powerbar or some boiled sweets. I normally try to carry a reserve of about 1500 Kcal.

If you have the metal cup, drop that in as well.

You could carry some of that in your pockets rather than in the pouch. In fact I would encourage you to do so.