We don't know what the management are thinking right now, while Tatum is out, they are trading their core stars, let see if what will happen to their campaign this upcoming season, for me, business wise they need to free up some expense then try to rebuild a new core to help them to compete though expect that it won't be the same since new sets of players /stars that will play for them, we can't conclude yet if what may happened as there are still possibilities that they may form a new compettive squad while Tatum still resting.
The management is thinking about money and expenses right now. Without Tatum they won't be a championship caliber team next season, so why pay this team A LOT of money without any chance to win anything, while going over the 2nd apron which makes them lose draft picks, lose the right to do trades and so on. They are shipping away big contracts, which I think is smart. NBA is still a business and the new owner just doesn't to burn money obviously.