Meph,
In my current game I set animal men to 0 and giant animals to 10. I understood this to mean NO animal men and a low chance of giants (I like giants, but too many feels wrong...) I am overrun with animal men of various sorts and seeing a lot of giant creatures too (every other spawn, I'd say.)
Which brings me to: Is this a world creation setting or a game setting? I created the world when other settings were active.
Or, does this setting function? Or do I just misunderstand what it does?
Also scratching my head over pop limits. I went extremely low this time because last time I was seeing huge migrant waves early on blasting past the cap. And my fort value and exports were low. Probably a vanilla thing. So now I have seen NO migrants (set cap at 20 :p). Still at 7 a year in. I had planned a small game anyway, so not a big issue, but does have me wondering how the pop cap thing works these days.
An aside: I messed around a bunch with world generation with vanilla settings and didn't see crashes, though I kept them on the small side and didn't try to run history beyond 100 much. This is just to offset some of the complaints of world gen crashes. I did not used advanced world gen for these, just the basic gen, but varied the settings some.
I'm still adjusting to the changes to vanilla from the legacy MWDF days. Some things do work differently (better in a lot of cases!) But not uniforms...