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In the game, there's a complete imbalance because, first and foremost, you should focus on upgrading the skills of scouting, training, resistance, and artillery (skills related to machines).
With scouting, you can get a free level 8 monster; training gives you a chance to get an additional bonus to attack, defense, etc.; resistance can turn titans into giants, which completely changes the entire battle; and artillery is also an awesome skill!
P.S. And the AI is now completely terrible; I haven't seen such a stupid AI before (if you enable fair experience gain, otherwise, if you play on the highest difficulty level, the AI simply gives too much experience).