Multiplayer mode
More interaction with the managers, e.g. ask the manager to play a certain player, to buy a certain player with the relationship influentiating the rate of sucess
More interaction with teammates, e.g. you should become friends after a while and if you move perhaps it'd be possible to persuade them to join you
Difficulties
Ability to become a manager when you retire
Ability to play as your son as you retire
Larger variety of celebrations
Press conferences
Stands not always full
Using the items you buy, e.g. drive your car ocasionally
The ability to play some mini-games during daily training
Get somebody to mentor you / mentor somebody
Cutscenes
Automatic replays from various angles (e.g. PES)
Multiple stadiums
Unlockables
Revamped quick match screen with a larger variety of settings, like stadiums and weather (e.g. FIFA)
Classical / important / memorable matches to play as challenges (e.g. Liverpool 3-3 AC Milan)
Challenges e.g. 2 goals in 5 minutes
Lottery
More casino games
Bad referee calls
Lower teams like U18 or reserves or B teams that are linked properly
Dives
More complete newspaper along with more info on rumours or such
Revamped player AI
More 'destructive' ways e.g. make alcohol turn you into an alcoholic or make you drink automatically if you usually drink manually (in NSS4 ofc

), thus leaving you sometimes in a state where you can't even open the room blinds let alone train
Make valuable / important / legendary players (legendary in relation to the club he plays in of course!) have a say on the team's management, perhaps on the purchases that are made e.g. if your favourite team is Arsenal and Fàbregas dislikes you you may not be able to get to Arsenal (of course the manager's personality has a say here too, personally I can't see Wenger letting Fàbregas have a say on the team's management despite he being a legend for the Gooners)
More competitions
More player costumization e.g. hair styles (ahem, that's why we filled that db field

)
Instead of deciding your stats on your own, have some sort of questionnaire at the start to automatically give you stats based on your real life personality
Advantage rule
More stoppage time
Difficulty time settings
More awards
Your wife / girlfriend and sons / daughters having names
2D engine - confirmed
Starting off as a kid who goes to high school and then get scouted
Club rivalries
Friendlies
Ability to be a referee or a chairman
More information on the clubs before the match e.g. results of previous matches between both clubs
Block tackles using the system present in NSS3 i.e. press the lob key and you'll chase the player who has the ball and automatically try a block tackle
Combos between certain keys to make special moves / shots
UEFA coefficients
FIFA rankings
Option to disable transfer mode, thus letting all players not age and keep their stats the same whereas your own stats still age naturally
Different personalities / capabilities / moves / styles for your own player and for the other players e.g. Mascherano should be able to get 150 in Stamina whereas other people would still be limited to 100, Walcott getting like 175 pace and us mere mortals being restricted to 100
More of a game-like feel - full interactive clicking to buy and place things around so that the game doesn't become too menu based.
Gifting your family, friends and gf instead of just giving them a share of your paycheck
Giving purchased things some purpose e.g. having a car reduces the time it takes you to go somewhere
Overall atribute (PES-like)
Better autoshot - remove the directional arrows if autoshot/autopass is on and automatically shoot and pass like in PES or FIFA
Have pace and acceleration actually work e.g. Walcott will always outrun everybody else, or almost everybody else
More chaotic clearances (but not like Bendtner's

) - Instead of always properly clearing the ball upfield when there's a lot of pressure going on, give possession away or put it out for a corner or throw-in.
Have real-life weather e.g. if it's raining in London IRL while you're playing at the Emirates, then make it rain in-game
Only get trials from lower-league clubs and from your own country only
Give your opinion on your club's latest signing
Go to new season button
Double nationality or request citizenship if you've been in a country for x years
Have your player learn a certain language, and if he doesn't, he won't be able to communicate so well with his teammates
Be stripped of your captaincy if you do something bad (*cough*Terry*cough*)
Accessories and wristbands and so forth
Decimal match ratings
Have a player be an expert in this but definitely not in that e.g. Carlos Martins from Benfica is an ace when it comes to take freekicks and shooting from far out but his stamina is 0, really, it's 0
If you were able to get to a certain level then you should be able to play as a certain player e.g. you get to Messi's status, you can play as Pelé
One-button control like in SWS
Bigger variety of minigames
Simpler data format like in PES' Master League
Better atmosphere e.g. vuvuzelas, your supporters singing more and more and more as you play better
Time wasting e.g. you're 1 up against Arsenal and you're Preston North End, take your time when taking a goal kick
Text-based mode like in NSS1/2, even if it's an option
Bubblehead players
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