1.A nice, realistic detail would be this kind of weather where there is snow on and around the hill and it's raining, which causes the snow to transform into water (snow in rainy weather should look different), maybe some visible spots on the hill? Just like Sochi this year.
2.Spectator mode in online game.
3.Motion Blurring
4.K.O system
5.New trees.(with snow,without leaves etc.)
6.New hills
