Bit of a Necro...
Still playing this an awful lot oddly enough, been playing around with modding it a bit. Invented a new metal that is almost as strong as Adamantine, but much more common (just to see if I could). However, my favourite bit of tinkering means that I now have War-Deer, War-Foxes and the unstoppable War-groundhogs. Oh yes, and, as of 2 years ago, a War Hydra...
My only real complaints are Food and Rubbish, particularly XBow bolts, which seem to lie around outside when fired, and yet, when you make a squad of dwarves with XBows active, they seem determined to grab those particular bolts for ammo first, which isn't good if you have several dozen Goblins lurking outside. Only way to stop that, I've found, is to forbid all dwarves from going outside during any emergency.
Food, is just a question of balance, it's like spinning plates, fun, but really hard to get right.
Might look at creating some new animals as well, just out of curiosity really, besides, a War Deer isn't about to to significant damage to any rank and file, even if it does scare the crap out of Kobolds for some reason.