- Guard mode button.
- Some representation of the Roman "Limes" system of fortifications and defense in depth system. This is hugely relevant to this time period and the game would be completely remiss to exclude it.
- Torches that don't look like electrical spotlights in night battles.
- City view.
- A more exciting soundtrack.
- Soundtracks for each faction or culture.
- Faction into videos.
- Faction victory videos.
- Agent videos.
- Buildable roads.
- Buildable walls. The Aurelian Walls, Hadrian's Wall, and Theodosian Walls are famous.
- Loose formation for all units.
- Display -% of each side that are dead displayed by hovering over the balance of power bar.
- More detailed post battle statistics like in previous games that doesn't disappear after a few seconds.
- Some of the wounded soldiers able to recover after a battle.
- All buildings constructed shown in city view and on the battle map.
- Ability to destroy constructed buildings during battles.
- General speeches before battles with the option to skip.
- Historical event messages and historical natural disasters.
- A representation of actual population numbers. (Not an abstracted 1, 2, or 3 growth)
- Disease.
- Famine.
- Tunneling under city walls.
- Siege weapons that are actually pushed and carried not magically floated forward.
- Removal of ridiculous fantasy siege weapons like the gigantic tortoise.
- Ladders that are actual ladders and not giant roller ramps.
- Limits on elite troops.
- Unit cards that don't disappear when a unit routs. Make it optional at least.
- Removal of the double stacked unit card UI that takes up 1/3 of the screen.
- Removal of instant army to navy transports.
- Pirates represented by actual units not a percentage. Though they can be a percentage too I suppose.
- Cities reduced to non goofy sizes on the campaign map. There is no megalopolis that big even today.
- Inclusion of unit banners and the option to only have one banner per unit instead of many excessive small banners.
- More realistic looking banners.
- Routing enemies shown on the radar map.
- Removal of torches attack in siege battles.
- A non minimalistic UI that displays all the information I need in one place. This isn't a smartphone or tablet it's a desktop PC game.
- Picture in picture videos showing the death of generals in battles and wall breaches. Or zooming to the General when he dies like in Rome 1.
- Arrows that sound more powerful. In Rome 2 I think they sound too wispy.
- Slider option to adjust projectile trails.
- More historical battles and the option to play as either side.
- Banners stay on routing units so you can track them down and see their numbers and the factors affecting them.
- Agents with more distinctive roles and less crossover.
- Less agent and general upgrading spam almost every turn.
- A trait system that develops naturally instead of the player just choosing their traits.
- I'd rather have 2D advisors than 3D advisors that look the same and have low resolution textures and no anti aliasing.
- Unit armor that gets increasingly dirty, wet, bloody depending on what they've done.
- More realistic less jaggy and less shiny looking blood.
- Armor and weapon upgrades that visually change the appearance of units.
- Trade between cities of your empire not just with outsiders.
- A complete overhaul and expansion of diplomacy. Diplomacy is so weak in Rome 2.
- Less goofy sounding avatars in diplomacy.
- Client states and Satrapies that are actually worthwhile and not useless.
- Settlements outside of cities that can be raided like in the previous three games.
- Hotseat campaign.
- Drop in battles.
- Unit projectile range showed when you have a unit or units selected instead of only when hovering your cursor over the unit.
- All unit statuses shown on different parts of the unit card at once instead of only one status being shown at a time in flashing intervals.
- Health bars for ships.
- Visible turning arcs shown for ships.
- Units fighting to the death when surrounded.
- Ability to zoom in closer during battles.
- Removal of the unit fading system from battles.
- Removal of the formation attack button. I really don't understand this button. Units should always fight in their specific formations.
- Message boxes that drop down the side of the screen and have unique sounds when opened on the campaign map.