Lorcan Nagle said:Armageddeon replaces the entire EA list with three seperate lists. The early years, which covers up until just after the Minbari War. the Third Age, which covers up to 2262 or so, and Crusade, which covers everything after that. A number of ships have had their stats and/or priority levels changed too.
It appears (My copy hasn't arrived yet) that it's definitely not something you'd want to spring on a campaign unless everyone in the campaign is cool with it.