Sup y'all, been a while. I'm in the process of revamping the badguy civs. I wanted to wait until I was "finished" but that could take months to years at my current pace, so here's what I've got so far.
I've removed Ogres as a badguy race, since Ogre sieges are just too hardcore with .42 numbers. Some of the others have been cleaned out too to avoid crowding out the normal civs. I hope to eventually add my own badguy races, and I'm starting with the new Wyvern civ. They are basically animals, they produce no weapons nor can they speak (i think), but they can live in dark fortresses and siege your forts. I've seen them eviscerate trolls in arena mode, but I have yet to face an actual Wyvern siege.
Also, the original theory of Furry Fortress was that you would be fighting wars against other animal peoples, but the damn sissies just don't get angry at each other. I've attempted to rectify this by add "bad" versions of each civ with both baby snatcher and item thief enabled. You can also play as these bad civs, for more guaranteed FUN. Unfortunately, item thief playable races will give you stolen goods warning when caravans leave the screen (not sure if they actually stole anything) but it keeps you from playing patty-cake with the goblin civs. However, since any dwarven, human or elven civs would naturally be at war with you anyways, it might be interesting to have goblins as allies. I'll have to think about it. Or let you think about it. I don't know if item thief impacts visitors.
I have yet to actually face any furry civ sieges either, but theoretically they will have the ability to bring steel equipment and USE_ANY_PET_RACE war animals.
Plans for the future are to add more a few more monster-civs like the wyverns: Obsidimen, like gabbromen, but made of obsidian and with sharp claw and teeth attacks; Thunderlings, creates made of "lightning" probably like fire men, they would be small but incredibly fast; Oakgres, ent-like people made of wood, probably troll sized rather than ogre sized, since ogres were too hard core on their own, being made of wood would probably be worse. Maybe some kind of a centaur race, not sure if I want to replace the game's fanciful one, so they might be something like dractaurs or bugtaurs (although we've already got horstangs and formicines, so I might skip it) Maybe flip-side versions of the default races, powries as bad dwarves, drow as bad elves, barbarians as bad humans. Might do rakshasa, flying poison-clawed cannibals of Indian legend, but I need to think of a way to balance that out.
Another thought is to make more beak-dog style animals to accompany sieges, since armies of beak dogs are pretty boring. Ideas off the top of my head are just to use prehistoric animals, kelenken, sebecus, daeodon, chalicothere, brontothere, gastonia, azhdarchids, etc. Some of the old siege mounts would be cool too, I miss goblins riding giant toads and death worms. Maybe some iconic dinosaurs. I think if people recognize the names it gets too scientific and not fantasy anymore, but then this is a world of fox and rabbit people, so the fantasy theme may have worn off already.