If true then this is really a scouting issue. Time to upgrade those spots. Or at least start taking into account some sort of exterior consensus when it comes to the draft. It's not that complicated. There are websites and youtube channels that do as much and/or better scouting than some NBA teams. It ain't rocket science.
Before you or anyone else gets their panties in a tither, there is only one scout on the staff that was there for the 2015/16 draft, and it was his first year on the job. That's international scout Peja Drobnjak, who is a close friend of Vlade's and played on the Serbian National team with both Vlade and Peja Stojakovic. How much value Vlade put on his opinion at that time is anyone's guess.
Another Serb, was hired by Vlade just recently in 2018/19. Zarko Paspaji was also vice president of the Serbian Olympic team under Vlade, and also played on the Serbian National team. He's also a good friend of Vlade's.
The Director of Pro-Scouting for the Kings, Adam Filippi has vast experience and is highly respected around the league. He started his career with Nets in 1999, and at the time was the youngest scout in the NBA. He founded Global Vision, and international scouting service that consulted with many of the NBA teams. After the Net's he spent 10 years as a scout for the Lakers under Jerry West, and then 7 years as a scout with the Hornets. He's written two books that are highly acclaimed. "Shoot Like the Pro's" and "Mastering the Art of Free Throw Shooting". He's also a certified personal trainer, and performance specialist. He was hired by the Kings during the 2018/19 season.
Gregory Stratton became a Regional Scout for the Kings during the 2016/17 season. From 1993 to 2001, he was the team coordinator for the Orlando Magic. From 2001 to 2006, he was the manager of scouting for the Warriors. From 2006 to 2012 he was a scout for the Orlando Magic. From 2012 to 2016 he was a regional scout for the L.A. Clippers.
Gene Cross became a regional scout for the Kings for the 2016/17 season after serving as an assistant coach for the Reno Bighorns during the 2015/16 season. Which he as least coached Papagiannis but had nothing to do with drafting him. Prior to that he was head coach of the University of Toledo, and was an assistant coach for Notre Dame, DePaul, And Virginia.
Both Chris Alpert and Acie Law were hired in 2018. I'm sure everyone is familiar with Law, who played in the NBA not that long ago. Alpert has a lot of experience in the NBA ans was recently the Vice President of the D-League, now the G-League.
So as you can see, only one person in the current scouting dept was with the Kings in a scouting capacity when he was drafted in the 2015/16 draft. Im not a judge of who is or who isn't a good scout, but to my mind, it appears that the Kings have hired very experienced people who have been around the block a few times. I'm not sure how much responsibility you can put on Drobnjak since it was his first year on the job, and he probably had the least amount of experience. But then that might explain such a poor decision at the time.
Let's remember that the Kings scouting dept was left in shambles by the Maloof's and had to be totally rebuilt. Hopefully those kind of mistakes are in the past.