Mike Miller literally had ONE playoff series in three years where he mattered in more than one game....and even in that series (Spurs 2013), he could barely walk, barely defend, and only scored in double-digits once with THREE goose-eggs. It's just with Lebron pulling the entire defense inside, having someone who can stand in place and hit an open three was huge. There are 100 guys in the NBA who could have given the Heat 5ppg on 40% shooting of open threes.
And Mario Chalmers?
In the 2014 playoffs he averaged 6ppg and didn't break 8 points ONCE in his last 14 playoff games. In the 2013 playoffs he had 3-4 good games, but that just hid the fact that he was shooting 40% for the playoffs and sabotaging the team with bad decisions on the worst moments. 2012 was his best year, but again he was basically blowing up once a playoff series and then playing forgettable the rest of the time.