For me football manager should have:
more realistic team ability eg not man u 15th and wolves 3rd
to be able to use your manager wages eg invest in club or buy personal items like a sports car
to be able to recommend any affiliated club
to design your own stadium eg choose stadium type, seat colour/pattern, roof type and how many tiers press rooms ect
to be able to build youth academies around the world and watch players come in
to be able to buy the players in grey
to have a wider choice of player interaction options eg when a player us unhappy a option that would be suitable
........and improvements on everything already in the game
more realistic team ability eg not man u 15th and wolves 3rd
to be able to use your manager wages eg invest in club or buy personal items like a sports car
to be able to recommend any affiliated club
to design your own stadium eg choose stadium type, seat colour/pattern, roof type and how many tiers press rooms ect
to be able to build youth academies around the world and watch players come in
to be able to buy the players in grey
to have a wider choice of player interaction options eg when a player us unhappy a option that would be suitable
........and improvements on everything already in the game