Red has the advantage of offering his templates, while blue has the advantage of choosing the color. By introducing a trade, blue loses his bonus. Since the castles are random, you could introduce a specific, fixed bonus for the blue player. That is, blue chooses whether to play as red or stay blue, but with money. Let's say 1500 for the color? I think we can discuss the price. Also, there are still rematches with color changes :) This point should also be taken into account.
I disagree. Blue has the right not to choose a mirror from the 3 offered templates, and if he does choose one, he deliberately deprives himself of the color bonus, and no one else deprives him of it.
