I have a hard time seeing how playoff bound teams would be in a lottery.
The simplest and fairest way would be to order the teams according to ‘points’ (row, p%, adjust for the max games played by whatever teams have played the most).
Top 16 teams are considered ‘playoff teams’ and pick according to that order. The remaining teams play the lottery as they usually would.
There is no reason to do any different. Just because there was no cup doesn’t mean that everyone should get into the lottery. Some teams could have tanked and gotten better odds, and some would have surged and made the playoffs, everyone is in the same boat of coulda shoulda woulda.
I can’t see the league getting all convoluted after so many games have already been played. Sounds more like wishful thinking for the fans of good teams.