in modern warfare it would nice to see or have an option to see a graphic depicting the award / medal receivied. imagine an air unit could have Distinguished flying cross, iron cross, etc attached to a unit making it unique rather than 4 types which are same as we see in Civ 6, the unique decorations would give each unit its unique ability. a DFC guy may be good in aeriel combat and deployed to protect cities would be able to protect a perimeter of say 5x5 tiles. ... for incoming air units and missile attacks (lets not forget the foxbat was designed to shoot down missiles.)

also harriers didnt need airports but could be operated out of a small strech or a clearing even in the jungle... the JSF follows that doctrine... so it would be good instead of a figther unit one gets an option to build a VSTOL or a regular aircraft which needs runway to launch ....  with standoff weapons can be fired off an aircraft miles

away, a player should have the option of shooting a cruise missile (tomahawk- a subsonic missile or bramhos - a supersonic cruise missle) thereby saving itself from Air defences of a city.

Sealing off borders for a country where no units , military / trade or religious can cross it, as in real world like south and norht korea, india Pakistan such borders exists completely sealed off and illuminated (which can be seen from space) such borders can also be wonders of hte new world as they are unique and generate a lot of buzz in the world. a picture of India Pakistan Border i took from a flight....

airlifting of units sholdnt have a movement penalty of a turn, as in actual life it wouldnt take a year to deploy the airlifted troops .... while you could take a movement penalty (44 tiles instead of 5 movement, that would be moe prudent.

with technological advancement flights can nearly circumvent the globe.... hence bombers should be only airbase based and as generational upgrades happen they can strike farther distances, and a bomber like B2 can strike halfway across the map, and to assist satellite imagery also needs to be thought of where a civilization can have a map opened up via satellite view and target with a B2 stealth bomber.... as for carries they should carry a contingent of multirole fighters and have around 15-25 numbers, and the cost to manufacture a carrier should be huge.

a opportunity should be available to players to create carrier battle groups by clubbing submaries, destroyers ambhibious assualt platforms, missle cruisers into one bog battle group which is self sustained.