Can't try it because it is being hn-hugged to death.
So, I will just comment that I've really enjoyed chess.com's fog of war variation. Basically, you can only see the squares where you are legally allowed to move, adding a whole different level of strategy to the game.
IIRC the Lichess dev isn't too fond of random people adding big new features. They tend to be a bit sloppily written (by people who don't have as much Scala experience as other languages) and then people ditch the project and don't maintain what they built.
And he said it's really difficult to remove features. The smallest most obscure thing will have at least one user. Removing a game mode or big feature makes loads of people angry. But he hasn't got time to maintain the millions of things people submit and then never touch again.
So, I will just comment that I've really enjoyed chess.com's fog of war variation. Basically, you can only see the squares where you are legally allowed to move, adding a whole different level of strategy to the game.
I wish lichess could add it!