1) Nakai as refugees is bugged. Yes I know this was mentioned a LOT in the past and it was because of a vanilla bug, but now it's caused by this mod and not a vanilla bug anymore.

When getting Nakai he's still marked as a horde lord and doesn't have an encampment stance.

I tried it with just this mod activated, and getting him as refugees he had these bugs.

When I confederated Nakai myself in vanilla (no mods enabled) he wasn't bugged, and has an encampment stance. So that means it's this mod, not vanilla. In both cases I tested while playing Oxyotl.

So in short:
Getting Nakai as refugees when playing Oxyotl, he doesn't have an encampment stance/is still a horde lord. But when playing vanilla Oxyotl and confederating Nakai, he works like all other normal lords.

2) This mod doesn't work with Beastmen legendary lords. I know you have turned it off for Beastmen as the Beastmen have a different style of confederating, which is fine when you're actually playing Beastmen. But if you're playing for example Oxyotl and use the cross-faction setting (with the Mod Config Tool), you're still not getting the Beastmen legendary lords as you're probably turned them off for all factions. In that case it would be great if we'd also receive those.