The biggest issue for me is when you look at the enemies stats and they have ability modifiers that are impossible for L4/L5. Why do Githyanki warriors, for example, have such high Wisdom? Githyanki have STR and INT and we are facing Fighters. It would be logical for them to have STR, CON, maybe some DEX, and possibly INT.

Why are their WIS modifiers so high? This is the same with sooo many other enemies.