Personally, I don't see why Douby or Williams are participating at the summer league. They aren't going to develop playing against this caliber of competition--what they (douby in particular) need to prove is that they can compete against actual NBA players and not just the Jared Jordans and Pape Sows of the world.
The Kings have not seen very much of what Williams can do given some minutes. His summer league stint was necessary to get a better handle on his game and style. I personally think he has a bit of a Brad Miller type personality, quiet, not a lot of visible emotion, big and able to bag but not consistently. He has the tools but does he have the drive to use those tools to advantage? Not sure how much of that he did last week but at least the Kings got a chance to see.
Douby is on the bubble and needs to up his game and show that he is the #2 SG on the team behind Martin and the main scoring guy off the bench due to Cisco's inconsistency scoring last year. His summer stint helped him big time, helped the Kings to see what he can do given the minutes (the overall best scorer in the summer league and an excellent defender), and showcased his skills for everyone else.
I think there will be 3 main issues going into training camp in October:
1. RonRon and who (or what) we get for him. This affects everything else the team has to be looking at or considering. Until that is resolved, will be difficult to make any plans or decisions about anyone else.
2. Douby. His defense is excellent especially on the perimeter and may be the only King that can be said about, and he can be a major scorer. Can he become the main bench guy for Kevin or when Kings want to go with 3 guards? Does he compete with Salmons for playing time? yes. But who gets more and why are the big questions.
3. Mikki. He will be the starter. But when can Jason get enough of his minutes to warrant starting? After the all star break maybe. More minutes than Mikki before that? that will be his goal. Then at the 4 what happens to Shelden? Did summer league help him or not? Difficult to say. Probably stays unless he is part of a trade package with RonRon.
Brad-Mikki-Jason-Spencer-Shelden are the 5 "bigs" for now assuming SAR retires and they somehow dish KT.
Kevin, Beno, John, RonRon (or his replacement), Cisco, "Q", and Sean are the 7 others. That leaves 2 spots. Now we will see Reggie and GP earn their salaries in the next couple of months.