ok, i know how much you like attention to detail, but this is Glest, not real life.
now to answer your questions, most of them are a lot of work, and Silnarm has enough on his plate as it is. but things like the glestimals (animals and stuff) and different looking units thing are in the works, they will happen.
i understand your frustration with Glest's lack of a good physics engine, but we have to work with what we got.
lastly, stop making posts like this, and read that link that John gave you. (now, if you could create some solutions to these problems, and not just shout them out, then maybe we wouldnt be so disapproving)
-Zoy