"Selection of opponents in the Tower slightly changed, on low Leagues became easier. In Leagues 1 and 0 became a little more difficult."
In league 2, the opponents used to have 21k-23k hp. Now they range from 21k-50k+ based on the few games I played. That's a big increase. Maybe it's easy for veteran players who have accumulated a lot of toys and viagra. But it will take new players much longer to reach high league compared to before especially with the nerf of the toys.
Please revert these changes. You are trying to balance the existing game modes around end game players that have lots of toys and girls but at the same time making it impossible for newer players. If the game is too new-player-unfriendly, it will die when the veteran players quit because you can't attract new blood.