On the positive side from a Purdue perspective, the fact that he felt enough of a sentimental connection to honor them by keeping them in the final 3 means that his brother loves Purdue. It says something, even though we knew the final result wouldn't be with them.
With that positive side mentioned, I honestly feel like dragging along the sentimental choice into the final couple schools for a big recruit like this is unnecessary and accidentally wastes their time, emotions, and resources. Like acknowledge them with a visit, thank them, and then just be honest with yourself to include the schools you're really looking at. Like with Bo Bassett continuing to include hometown Pitt-Johnstown in his update list. Come on. Unless he's privately told them he's not really considering them, but wants to prop them up, he should definitely drop them from his list sooner than later in his updates. Just be honest.