The Pacers are a nightmare matchup for the Heat. Paul George, George Hill, and Danny Granger are super long defenders; Wade and Bron will have a hell of a time getting past them. Even if Wade and Bron try to make a play when the defense collapses, they'll have to be pinpoint to avoid a deflection and a turnover. On the offchance they manage to get past their man, Hibbert is there to meet them, and if Bron's play against Dwight was any indication, you can expect him to cower when met at the rim.
Indy will have a similarly difficult time scoring but they have more weapons. Plus they actually have a legit matchup advantage in Hibbert/West v. the Miami 4/5, something that the Heat don't have at all. At the end of the day, the consistency in which the Pacer frontline can score will outdo hero ball. We'll see the Pacer bench (lol) show up more in Indiana as well, so I think there is a good chance they head back to Miami with a 3-1 lead. As long as the Pacers play methodical and limit their turnovers, they'll keep Miami in the low 70s, high 60s. They have enough firepower to beat that production any given night regardless of the defense, so I can't see them losing this series unless their inexperience really becomes a factor.