Have you forgotten about Paul George's injury? I think his injuries were far worse than Leonard's, but look where he is now. He is still playing like a true star.
Who could forget that? It's one of the worst injuries, and at one point, I thought PG wouldn't be able to come back anymore. But he did well; he was able to come back and perform like his usual self, which is in contrast to the case of Derrick Rose. However, I'm no expert. Although Leonard's injury doesn't look as severe, I still consider it very serious since it was an ankle injury, and that area is quite sensitive. Once a player has a history of injury, it becomes easier to reinjure again.
About Leonard, I think his Uncle (his agent) is just protecting him too much. Sure his +/- when he is around or not is damn high or low but it's just too much that a team would really accept that kind of load management. These are players who have contracts to play for a season, I'd understand the resting time on the last 10 games but during back-to-back games is kind of unacceptable. Same issue with Kyrie.
Anyway, it looks like the Clippers don't mind about that.
About the In-Season Tournament that will happen. Let's read the FAQs to understand it more.
We got used to the traditional ways so it's best we learn what they are trying to achieve here.
https://www.nba.com/news/in-season-tournament-frequently-asked-questions
The NBA In-Season Tournament is a new annual competition for all 30 teams that will debut in the 2023-24 season.
> Why is the NBA adding the In-Season Tournament?
The In-Season Tournament will provide players and teams with another competition to win, engage fans in a new way and drive additional interest in the early portion of the regular-season schedule.
> When is the In-Season Tournament?
The inaugural In-Season Tournament will tip off on Friday, Nov. 3 and culminate with the Championship on Saturday, Dec. 9. The complete schedule is here.