Even though Wang Yu was in the [Blind] state, he had a lot of room for error in his battle against Luke. However, he remained passive the entire time, having to rely on his senses to launch counterattacks.
Once his [Blind] state ended, it was like unsealing Wang Yu's vision.
Even with his eyes shut, Luke wasn't a match for him. Now that Wang Yu regained his vision, a man who could now go on the offensive was no longer a man forced to stay in his passive state.
His attack rate increased exponentially.
Even though Luke didn't manage to take advantage of Wang Yu at all, he had the upper-hand in the battle before, suppressing Wang Yu as he fought.
Now that Wang Yu could take the initiative, Luke lost the last remnants of his advantage.
Old man Luke couldn't even defeat Wang Yu while he was blinded. Now that Wang Yu regained his status, how could he defeat him at all?