It's a great idea. It's just endlessly slow. In Lichess I'll wait under a second for the AI to move. Here it can take 5 seconds. Are you willing to sit around and wait that long in any strategy game? Also, it's really ugly and by far the hardest thing for me was to make out the positions of pieces. I probably lost 300-400 Elo just on that alone. At the end I just got tires of waiting and quit the game. It's not useful for training. Good concept for sure, but it needs to be adopted by Lichess.