I understand what you mean, do you have any other factions that horde and work?
If so have you compared them to the crusader states (mmm, Im stating the obvious here aren't I, sorry its just that when I do any programming or coding work for uni I always miss obvious stuff until Im telling someone about it). What about the original BI horde factions...compared to them?
Also, is there a limit on the number of factions that can horde?
As for battlefield buildings not showing up, I have no idea, first Ive heard of it, any other mods used BI like this?