Just played the first game where I threw a party of late Novice/early Seasoned players against an Allosaur, and it worked really well. I was a bit worried it might be too much, but it turned out to be a perfectly good challenge for the party. Thanks for helping an epic scene happen!
Only thing I am missing is some sort of Intimidate and/or Fear ability. I think this is something every at least carnivore, but also many herbivores, would be able to do reasonably well.
I would also appreciate if you would also include some of the bonuses and penalties that result from a specific size, such as +1 wound.