EB is harder than vanilla. If someone was barely getting by on VH/H or whatever the level was, they need to maybe start out at an easier level in EB. But the finances work as they should. There will be some tweaks, but no overhauls. Every faction is playable as they currently are, but discretion has to be used. None of these factions conquered the whole map by 150BC or even a quarter of it by 200BC in real life; EB is slower and harder than vanilla for a good reason though.