There are some great mods. At least in model and texture. There are very talented modders that can't name because rules but they do high quality animals. The ones that don't work for me are the ones that need very specific animations or sounds or behaviours that can't be replicated through modding (for now). The rest if they look great and don't sound too disruptive are great for variety or falling the gaps that the official game Will leave.Pz is one the few games where i am completelly uninterested on mods, mainly because most mods looks and sound really bad, imo.
The ones i just can't use because are too immersion breaking for me are the bird mods based on things like capuchin monkeys and Wolverine. And some aquatics mods. But for things like ungulates and carnivores, some bird types, etc, they are pretty great.