I'm pretty sure this message is intended to state that the developers are not happy with the game breaking balance problems they've been having so they are punishing the players because of it instead of fixing the underlying problem of certain overpowered decks and abilities which exist and can be taken advantage of to make steady progress up the ladder of the Tower.
I don't know what's worse, being told that my months and months of game time to achieve League 1 while being under levelled is a problem/crime/unfair or being told that all of my efforts and hard work to max out certain cards for my decks as high as I can get to take advantage of the tried and tested game winning strategy to achieve success is going to be wiped out simply because I am not at the level that they expected me to be at despite the fact that it took three years to make it almost to the top anyway.