I guess we will disagree on this one. Because if you are going to say "It was a huge...mistake", the fault absolutely falls square on the shoulders of Lindsey. He was the GM, he was in charge of scouting, Intel, draft preparation, roster building, everything. If he gets credit for discovering Gobert he gets the blame for whiffing on Trey Burke. He shuffled a bunch of assets around to get one decent player.
It was a good move, it just didnt work out. It was a mistake, but it was a mistake I can't fault him for trying. It seemed good at the time, Burke just never learned teh NBA game.