I believe the game itself does not have much content in general... its an incredibly small game compared to other games of this type....
What could be improved is:
-A better storyline. Players can tell what the game is about from the first 2 missions
-More Boss Fights. The game has very few bosses and therefore is not enjoyable with only 4 bosses in it (prestige not included)
-More weaponry and armory. The game's armory and weaponry is incredibly weak. The armors give the players little options and the new ones only give a couple more add ons that could be obtained through UV's. Also the game has few weapon types that may not suit all players.
-The game is NOT community friendly. This game compared to Team Fortress 2 has nothing to do with the community... while half of TF2's cosmetics and weapons come from the community. Also TF2 has an amazing economy system which is quite unique and other games barely have.
-The game's updates include only cosmetics,promo weps and badly made reskins. The only cool update seen so far is the gunner update but even that does not look as promising. Also whenever they release a promo weapon the weapon is not obtainable unless the player has an insane amount of crowns, energy and/or real life money to unbox it by chance.
To conclude: The game has no story. no weaponry and armory and its updates include useless cosmetics and the game itself is small non interactive and not community friendly :)
Last edit: ok so lemme explain what's going on here... the game has very few space... it barely touches 1 GB making it have incredibly low content. For instance, what good are cosmetics gonna do for YOU? What good are badly made reskins gonna do for YOU? and more importantly what good are non interactive and copy pasted levels gonna do for YOU?. The fact that the dev team of SK put little effort in this game does not make it worth playing... The game has little effort put into it, the gameplay and combat system of the game is suck-ish and the fact that its bosses are incredibly easy to beat even if you go on solo elite makes the game non difficult at all. Also the game has absolutely no interactivity. The only thing you do which is barely interactive is touch buttons, press party buttons to open gates and maybe even shoot at switches but that's about it... I believe the developers of SK can do something to improve the game... they just don't care... I mean seriously they won't even allow players to create a simple reskin of their own with their own effects its even against the rules!! The game is ridiculous like wtf is there in this game that makes it so good... which is not... There are many more stuff that make it bad and i could go on but i won't... but i still could :D
None of the above. They are busy with promos, lol.