Hello Nosseee!!
As the others said Among Slimes should not be back as the permanent game, this one was popular for a time, but due to the playercount the last months, the game became less worth it to play.
Also I understand that you don't want to wait for playing a specific game due to the featured game rotative system, but look at this in another POV, more players will play it when it will be selected as a featured game and everyone will be able to enjoy the gamemode with awesome game to play!!
I understand the frustration of all the Among Slimes player just like the frustration of the Assassination players to see the game completely removed, but the reason behing this choice have been made for specific reason who are legitimate. And who knows maybe we will see a new game appearing replacing the spot of Among slimes and that you will enjoy it a lot, it's only a question about patience ;)
Kindly,
Melvin The Arctic Fox