Do you really think that they could only manage to play a mere 3mins more per game?
On the other side, LeBron played almost 46min. Up from 37mins in the season. Now that's incredible, and isn't a standard I think the Pacers should meet, but LeBron played more minutes during the season and he could still manage to give even more during the playoffs. But it also should point out that it was his highest amount of playing time of a series throughout the playoffs.
Wade also was playing 42mins (also the highest for any series during the playoffs) up from 33mins during the season.
Surely the starters could have played a few minutes more apeice. Not only that, the other big problem was how Frank used his bench. Instead of mixing and matching starters with bench players, he went with whole sale changes.
For as much as I like Rick Carlisle and Frank as coaches, these egg timer substitutions make me want to pull my hair out.