No they didn't. How many other teams had a new coach last year and two new starters(by the end of the year)?
The Pacers had much more to work on, compared to say teams like the Heat and Thunder. Whose coaching staff had already had time to work with their players the previous year. And whose lineups were relatively static.
Where as Vogel had no training camp to introduce his system. He had to introduce during an already truncated season. While trying to phase in 2 new key contributors.
I don't see why this is hard for you to understand.