Short Answer
Potentially. An improperly balanced system can alter airflow patterns and reduce intended performance.
Detailed Explanation
Yes — more exhaust ventilation isn't always better. If exhaust capacity significantly exceeds intake capacity, the system creates a negative pressure situation where exhaust vents try to pull more air than the intake can supply. This can cause exhaust vents to draw air from other exhaust vents (short-circuiting), pull conditioned air from the living space through ceiling gaps (wasting energy and introducing moisture), or create uneven airflow that leaves portions of the attic unventilated. The goal isn't maximum ventilation — it's balanced ventilation where intake and exhaust are properly matched to the attic size and geometry.
Why It Matters
Over-ventilating the exhaust side without matching intake is a common mistake that reduces ventilation effectiveness and can increase energy costs.