Better lloking terrain..although very nice cities and the trees are kewl!Plus the clouds ROCK! But when Im in the air I dont have a sense of flight..Lack of propper ground shadows/color or cloud shadows and the over saturated color (yes my gamma and color settings are correct or fine) of the land scape makes the game feel to arcade like.. Falcon 4.0 had excellent landscape detail however cant compare in detail but from medium and above altitude falcon 4.0 had far more realistic looking terrain..Now the map and terrain provided is fine just how it looks visually is what im getting at for those who might miss the point.
Rain to actually fall from clouds intead of thin air
the ability to shoot down other planes without having to hit them 20+ times to cause any significant damage or avionic failer on thier part.. Damn took almost 80 rounds to down a tornado.., or if you hit thier engine all it does is give black smoke.. Most unrealistic and should reflect realistic damage taken depending where the aircraft is hit. War birds online is a better example of damage taken and system failers do to cannon fire (yes I know warbirds is a WWII sim).
the ability to take out any static/non static object in campaign mode.. In f-15 campaign mode i switched to the A10 and I couldnt blow anything up.. truck took a direct hit from cannon and from cluster bombs with no effect... F-15 seems unable to blow up any static upbjects with cannon fire or a lucky missle.