Not to spark a debate but I wouldn't even trade Cousins for Davis.
Neither would I.
The Kings won 17, 25, 24, 22, and 28 games in the 5 seasons Tyreke Evans was on the team. 2 years into his tenure with New Orleans he is on a playoff team that won 45 games during the regular season.
What was the big difference? Simply put, he has better players around him.
Once the Kings have better players surrounding DeMarcus, as well as some stability within the front office, they'll start winning -- A LOT.
The only player in the league, IMO, that could have made a huge difference in the W/L record of any of the teams DeMarcus has played on since 2010 is LeBron James - a once in a generation player. You swap out DeMarcus out for Steph Curry, James Harden, Kevin Durant or any other star player in the league and the team isn't much better, if any, given the complimentary talent and front office instability. And we're not talking about only 1 season of this BS. It's been this way ever since Big Cuz was drafted and heightened in the last years of the Magoof era and this year with all the ridiculousness that occurred during/after Cousins illness.
Point is, placing blame at the feet of #15 is flat out foolish. Despite how good he is, and especially considering how deep the Western Conference is, you can't expect one player not named LeBron James to carry a franchise like this one.
With regard to Anthony Davis, the Pelicans won 27 and 34 games his 1st two seasons. They are now winning because AD not only improved, but mostly because they have surrounded him with capable talent AND because they have front office stability with an owner that stays out of the way.
The reason I wouldn't trade Cuz for Davis, as great as he is, is because I believe Cuz's game is better suited for the playoffs than AD's ever will be. I'm not saying AD can't win, but you saw Draymond Green move him off the block and out-muscle him for key rebounds. I think that will always be the case with AD because of his slender frame. Also, when AD was called upon for a game-winning shot, he wasn't able to muscle through "playoff" contact to get a descent shot. DeMarcus won't ever have those problems.
Davis is obviously a better shot blocker, but I don't think he's a better defender because he can be moved so easily. DeMarcus blocked nearly 2 shots per game this past season and has consistently drawn more charges than anyone in the league. Most importantly, he snatches defensive rebounds as well as anybody in the league. Offensively, AD is a more efficient shooter, but he can't score on the post better than Cuz nor is he a better passer.
All things considered, I believe a team with a solid supporting cast will be better off in the long run with DeMarcus. Right now, AD has a solid supporting cast from top to bottom whereas Cuz does not. The Kings have essentially no bench and a disjointed starting 5 with poor perimeter shooting skills.
Improve the bench, acquire some legit shooters and see what happens.