If they can get Boogie for the vet minimum for a year, they should jump at it. Chump change. Just his presence on the court would make a difference. None of those guys Ainge is signing will make a dent on the opposition. Boogie will cause Davis and Embiid to get a little nervous. Even at less than 100% in the finals with the Warriors, he played very tough and with heart. The guy is a beast. He's a long version of Smart in toughness.
If Boogie was good enough for the Warriors, he should be good enough for the Celtics. Ainge loves Smart, and Smart is the same sort of beast on the court. The team needs more toughness, especially against Philly this year. They are loaded up front, and Danny is signing too much inexperience.