Barring an injury to Brown or White for extended time, they will still be a solid team. They would have to really pull out some stops to tank. It definitely makes sense for them to move off of Holiday and Porzingas.The team is taking a year off but still has enough that tanking isn't a real option.
Porzingas has had a ton of injuries, but he didn't even look like an NBA player these playoffs. Maybe he can recover and be good again. But he really looked like he didn't belong on the court. Holiday is still an OK player, but he's definitely down to the end where he can be a nice veteran role guy off the bench.