You are right, for sure. this new game mode and map need to be big.
But I can tell you in my opinion, it wont last. It will be just as broken as the rest of the game if it even slightly follows in the core games footsteps.
A rework now will still take a lot of time sure, But Just them telling us its being worked on, would be enough for me to stay. The promise of a better future is better than none at all.