Did you ever worry that the recent expansions have been trying to do too many new things at once? Up through guilds, each expansion had one or two mechanical themes, then adventures comes along with 4 (Events, reserves, player tokens, travelers. Not counting durations, as they're pretty much standard now), empires with 5 (Events, Landmarks, Debt, VP chips, Split piles), and Nocturne with 5 (Nights, non-supply piles, Boons/hexes, Heirlooms, states)