The Creative Assembly are working hard on a major update for Total War: Rome II based on player feedback and metrics from the first few days of play. Though it will primarily focus on ironing out specific hardware issues, the patch will also "tweak the balancing, AI routines and other features."
Full patch notes will be available on Friday alongside the automatic update itself. Total War: Rome II will apparently be patched on a weekly basis, so we'll keep you updated. For now, you can read Matt's exhaustive Total War: Rome II review for our official verdict.