As I've stated a number of times this season, I think this is the right call. Not that there isn't potential for it to backfire, but I believe a change needed to be made.
Adleman's strength is his ability to relate to players, which was a much needed skill with the cast of characters they have had over the years. In fact it's still needed. The problem is that what the Kings need more than that is not what Adelman brings to the table.
1. The Kings offense existed becuase they had the players to run the Princeton offense. There isn't a lot of in-game coaching with that offense so Rick's X's and O's deficiencies weren't exposed. This team is not built for that kind of game and it shows. It's not simply an issue of not having played together as there is no real offensive scheme on the court. And Rick has never been great at subsitution patterns or taking advantage of mismatches. I don't know how many times in the past 8 years that I've screamed at the tv when Adelman adjusts based on what other coaches do. The other team goes small and Adelman won't pound the ball outside but instead goes small as well. The other team is killing you on a pick and roll and he leaves Vlade in to stumble around the court. Very frustrating.
2. This is a defensive minded team and they would benefit from a defensive minded coach. People can say all they want about the Kings teams in the past that put up better defensive team stats, but I think its fairly common knowledge that this has never been a defensive team and Rick has never been a defensive coach. It's not a criticism as most coaches in the league sway in one direction or the other. But when you have a team that isn't really suited to a coaches style on either end of the court, there's going to be problems.
3. Finally, they need a coach with a killer mentality. I believe Adelman is a nice guy and while that helps in the locker room it can hurt on the court. If you don't believe that, look at how frequently the Kings lose close games, don't show up for big games, let go of large leads, and generally operate as though they are trying to avoid losing rather than going for the jugular. They've got the players (mostly), I think it's worth trying to find the coach.