An ideal finisher is one who can get bat and ball and able to milk to bowler runs. But this guy cannot play anything short, a slower ball.
A real finisher is someone like AB De villiers. No, its not his big hitting or innovations, its his ability to get bat on ball that makes him so remarkable. Your big hitting and innovations are worthless when you cant get bat on ball. Another example would be hussey. No slogging or innovation, just proper cricket. Even pollard is an OK finisher because he can get bat on ball