If it were up to me I'd shorten preseason by 2 games, regular season by 8 but stretched over the same time period. I'd switch the 1st round to 5 games and the finals 2/2/1/1/1.
I think a season with less games would improve the on court product by increasing the value of each game and by reducing wear and tear on the players. That being said, I think lottery slots should be determined by a playoff of sorts, say a 3 round, one n done system with the winners getting first pick. Seeding would be teams with the closest records vs each other unlike playoffs where it's the most dissimilar teams facing off.