An huge upgrade that can attract people would be an overall graphic improovement , right now feels like an 2016 fps (graphic quality talking).
Maps are a bit too small ant empty , would be great to have more life instead of big grey walls , more people would be more attracted from it.
In genera im talking about every detaily in this game:

• new menu design -better skin quality
• better lancer quality and better styles In those type of games comunity need something more , by that i mean every one need a way to have fun and enjoy , if the game is too empty of content and quality only fiew player will keep playing , only the one addicted to competitive , and we dont want that , we want a more complete game that can give fun to the skilled player but also to the newest play that face this fps worls for the first time