Why don’t we have any perks for reaching level 100?
Sure we get a mythic skin and outfit but what is the point of earning xp from this point on?
Why don’t you make it that after level 100 every 100xp = 3 veritanium?
Or
75xp = 1 veritanium?
This way the players who have finished have more reason to play and earn xp.
Another idea could be throwing knives or a heavy melee attack (using the butt of a rifle).
Maybe make the impact option on the grenade launcher a mod to be equipped. You need to earn it by a certain level and must be impact or delayed. This will change gameplay and force players to choose only one option.