Not that I am a mod writer...yet, but have a suggestion for a new mod, which I would hope be incorporated into the sevomod.
Anarchy!! Every time I change a civics my whole civilization goes into Anarchy, which is pretty unrealistic.
My suggestions is that it could be changed as following....
1) The change should come over a period of turns (say 3 turns), where the old civic benefit/upkeep would gradually disappear, where the new civics benefit/upkeep gradually appear
2) although the civilization will not go into anarchy, there will be a number of angry people, say that during the change period there will be +1 unhappy person per city per civic change, meaning if you switch more than one civic.
3) Perhaps this suggestion will not be available early on, because it depends on a certain degree of organisation, but civics changes in this fashion would be available after the discovery of codes of law??
Any comments??
/MensSana