The End of the Ice Age Option does not kick in until the end of turn one going into turn two. I assume that this may have been done to allow the player to see the map more clearly before they settle the first city.
IMHO this takes away from the ambience of the starting enviroment, and the age of ice tile effects should be created prior to gameplay not after the first city is settled.
Yes it may be harder to see the underlying tiles for what they are, but there are toggles to help with that. Watching the world go from summer to winter in the first turn is more of a negative, then having to make a decision about city placement. Assuming that this was intended of course.
He did that so you could regenerate the map much quicker before you take your first turn.
The re-exploration adds a nice feature, but for me it is more of an aesthetic issue. It's really sad to see these features disappear from the map.
I agree 100% about aesthetics.
I think it would be hella cool if respective mana guardians could spawn at these too, even when inside your borders. So havign the broken scepulchre in your territory would be good for death mana, but every now and then a wraith would rise to defend it. I don't know about it appearing with spellbook or not, I guess that would depend on the randomness.
Another interesting idea would be only if you were aligned against the mana (ie Elohim with broken scepulchre), would it possibly spawn guiardians, or maybe if you have some kind of mana imbalance (5 water mana and pyre of seraphic) that the pyre would spawn guardians, maybe even have the chances rise the more of the "opposite" mana you have.
jus' random ideas.