The antonyms for the word "more casuistical" could be straightforward, honest, sincere, or straightforward. These words represent the opposite of casuistic which means having moral ambiguity, being deceitful, or being evasive. Being straightforward means being honest and direct with one's intentions, without trying to manipulate or deceive. Honesty, on the other hand, means having a moral clarity and ethics, without being ambiguous or obscure. Similarly, sincerity refers to being truthful and genuine, while being straightforward in one's communication. By using these antonyms, we can emphasize the importance of being ethical and truthful rather than being manipulative and ambiguous.