I Dont know about a mid season tourmament but if they wanted to stop resting healthy players during the reg season and stop intentional tanking its fairly easy.
1. First round byes for 1st and 2nd round teams.
2. Expand playoffs for teams 9 and 10.
3. 3 plays 10, 4 plays 9, 5 plays 8 and 6 and 7 plays
4. Resuffles next round when 1 and 2 play the lowest remaining seeds.
No more play in tournament
1. 10 Teams out of playoff participate in lotery.
2. All 10 lottery positions are subject to lottery. So every position is up for grabs.
3. Lowest team get best odds but not that much better than 2. 2 has slightly better odds than 3 and so on.
4. The 10th lottery team has the worst odds but can move up to every draft position and while their odds are the lowest of every lottery team they have a real chance at every position including the 1st pick. For example 1st lottery team gets 100 balls, 2nd team gets 90 and so on until team 10 gets 10 balls.