I too dislike being limited to only 3 Priests of Winter. I might accept it is they were extremely powerful, but they aren't. I made The White Hand a repeatable ritual after my first game.
I too think that Barbarian trait civs should be able to explore lairs, but that all the creatures spawned from this should be HN.
I too would like the ability to make more blizzards. I guess you could just make The Deepening repeatable, but it would also be nice if High Priests of the hand and Auric Ascended could create them.
It might be nice for the Illians to get some special use out of Great Prophets, as they are agnostic and evil so can't really build anything with them. Perhaps they could upgrade to (High?) Priests of Winter? (Actually, I found that Agnostic civs can still found the Empyrean and Council of Esus, so Great Priests aren't useless, but this seems like a possible bug.)
It might be good to just change the name of Snowfall to Blizzard, and make it also create a blizzard feature.
I'm also thinking it could be nice if Letum Frigus spawned Blizzards. I'd like the <FeatureUpgrade> tag (which is used to make smoke turn to flames) not to destroy improvements. Improvements should have a different tag that makes them have a chance to disappear instead of being destroyed when the feature is made. That would let Letum Frigus spawn the occasional Blizzard, and would also let me implement my old idea of making a forest preserve improvement that turns forests into ancient forests.
I really think it would be thematically appropriate for all the dragons to be awakened by rituals, but that the rituals should be cheaper.
One thing I enjoyed doing when playing around on my own a while back might be really cool: Give Dragons a Nuke Range, perhaps replacing the breath fire spell (I don't like that the ice dragon Drifa breaths fire). This will let them attack at range, and makes the whole world shake when they do. However, it will also make them unbuildable until someone finishes the "Manhattan Project," or in FfH terms the "Stir from Slumber" ritual. I'd make the ritual available earlier, but be quite expensive. It might actually be more appropriate to have a series of "Cult of the Dragon" rituals at different tech levels. Once the final one is completed, any of the dragon-possessing civs can build their dragon, and can do so very cheaply.
