what I don't like about animal men is all the redundancies present. like HugoLuman said, they all fill the same niche and are mostly identical.
This comes across as a startling difference to the animal men left over from the earlier versions of dwarf fortress. Each one presented a different challenge, and for the most part, had a unique ability - bat men ambushers use flying to path to your dwarves, frog men ambushers use swimming to path to your dwarves, snake men ambushers have a poisonous bite, ant men have a dangerous warrior caste..
compared to that all these new animal men are the same kinda thing, just different variations on 'person with the head and arms of a [blank]' that flit about occasionally spooking your hunters and beekeepers.
if they don't have traits that differentiate them from eachother in significant ways (like the cave animal men are supposed to) then there's little reason for there to be SO MANY OF THEM. The worst part is the atmosphere it gives off, these things having no real difference besides minor aesthetic leaves a bad taste considering they're mostly there because people paid for them to be.