Overcooked 2 is a great game, that has a big potential. It is played by a lot of people and the level selection grows with every new DLC.

However after a while, levels become repetitive and when you achieved 4 star scores on all levels, there is not much more that you can do, other than grind scores and play versus mode with friends.

The game itself is made out of maps/levels, which immediately bring out the question, whether you can add custom levels. Unfortunately, that's not the case with Overcooked 2, you are limited by the levels that are provided by the game and its DLCs. Which is fine for some time, but this limits the replayability of the game quite a bit.

Adding a level editor and the ability to play custom maps would bring a lot of attention, new players and bring back old players that have already finished the game and didn't play it for the reasons stated above. It would introduce new challenges (hard level packs, big levels, single player levels, etc.), it could also be connected to a global leaderboard with the best scores on a given level. The more features the level editor has, the better levels the community would be able to create. But even a basic level editor that would allow to make static levels would be enough to bring something new to the community and allow the game to grow futher.