Complex sentence: While the in-game explanation does offer a legitimate reason, that games traditionally end with one last super boss fight, the departure in tone from the rest of the game strongly suggests that the Wachowski brothers were giving the fans exactly what they wanted.
Split into simpler sentences: While the in-game explanation does offer a legitimate reason: games traditionally end with one last super boss fight. However, the departure in tone from the rest of the game strongly suggests that the Wachowski brothers were giving the fans exactly what they wanted.