I work in NYC and I like your kit (except the tire iron).

I wear a computer backpack and the main things I carry - all the time - are a flashlight, a bandanna, a liter of water in a metal bottle, a leatherman tool, some granola, a 4" Crescent Wrench, some flat duct tape, a small FAK, a scanner radio, some paracord (like 25'), an AA flashlight and a small prybar. The rest of the must-haves we have in the office.