How would they rethink it? It's part of the regular season. Will coaches tell players not to try as hard in those games, don't dive on the floor, try and lose a game early so we don't have a chance to win it and expend additional energy? I'm just not sure how their approach would change. I'm assuming they tell the players to play hard in every game and take no days off.
As far as the Fakers and Pacers, it's easy to attribute their performances post tournament to their efforts during the tournament, but as they say correlation doesn't equal causation. I think it's too early to definitively say that the IST is what caused it. After all, the Bucks are 6-0 since their loss to the Pacers, and the Pels are 5-1. So we're saying one extra game and a trip to Vegas had that much of an impact?