These have all been very likely reported already but I CBA to read 83 page thread in its entirety. If any or all of these have already been addressed then I apologize.
* Hell Terrain isn't showing up, regardless of what I do or gameplay options I choose.
* There's a "crazed killer" event in which you can recruit him as an Axeman with 10XP and the Crazed promotion. The Axeman comes with no XP. Also, the "Asylum" option doesn't list any prerequisites, but I couldn't choose it (as Mechanos, with starting civics)
* Resources appearing "due to warmer climate" appear on still frozen terrain. Not sure if that's really a bug or not, but camels roaming in hilly, evergreen forests covered in snow look a bit odd.
* This is more nitpicking than anything else, but it's = it is; it is not a possessive. I notice the mix up in nearly every instance of "it's" usage within the game.
* Numerous promotions (ex Mechanos Affinity) contain inaccurate text in either the main screen, Civilopedia, or both...though that's probably a WIP.
* The "Goblins are poisoning your land" event either makes me fight the horde or send an adept. Problem is, the prerequisite is Nature Mana. Wouldn't simply having an adept (or the ability to create them) or that + Nature Mana make more sense?
Also, and I apologize that this is more of a complaint than an actual bug, but whenever I play as the Svartalfar, the Ljosalfar constantly declare war on me (and only me) regardless of their "friendly" attitude, pitiful army, or the AC. I don't know if the two civs warring is rooted in FF/FFH/RiFE/LMNOP lore or what have you, but the Ljosalfar are committing what amounts to mass suicide in all of my Svartalfar games. It just seems a little odd that a civ that usually has a +8 or more attitude towards me becomes hostile for what appears to be no reason. Normally I'd figure that another civ was asking/forcing them to, but it happens way too often for that to be the case.
Last thing (finally!) is that multiple units can explore a lair if grouped together. I was wondering if this was intentional or not, since each unit gives a separate result.
All that said, I'm really liking this mod(mod), and look forward to trying out all the reworked and new civs. The Mechanos, my current civ, is quickly becoming a favorite. Witch Hunters do NOT mess around.