This was a wake-up L for the Cavs that it's not gonna be easy cruising against this team.
I think Garland could've played those two games in Miami but the Cavs felt they could handle the Heat, which they did, so they didn't feel the need to bring him back.
Against the Pacers, I believe the same thing happened. Garland could've played, but the Cavs wanted to see how far they could survive in the postseason without him. It wasn't too bad of a performance, but clearly, they need his extra offense and playmaking.
He'll be back for game 2 because now they know what they're up against.