Just so you know, posting a gear list is very brave. People take it as an open invitation to be really picky. It will be a long time before I do it. Although everyone's ideas are great, take them with some caution. Always remember to look at what your trip plan is (you haven't been really specific on this) and plan accordingly. Now, on to the nit picking.

You don't need a P-38 can opener and a SAK. If your swiss army knife has a can opener, then why take two, especially since you should think about not bringing cans.

Keep the umbrella, unless it is really heavy, then trade it for a light one.

You can switch paracord out with something lighter.

You don't need a sierra cup and a titanium pot.

If you need a nalgene because it fits your filter (you didn't say you had one) then you only need one. Otherwise, ditch them both for lighter options.

Personally, I don't like camelback bladders, but if you do, go ahead.

You don't need a 10 liter bucket. Sometimes if I know I need a large water container without carrying the water, I will bring an empty milk container. You can also use a heavy duty plastic bag.

No canned food.