Tracee, I hope you are feeling better. (What kind of cheer do they say at K-State?) Mr. Leonsis is not a house-cleaner. He will want to find the people who are smart and effective and who want to contribute to his kind of team.
You are right about his predilection for smart people. Mr. Leonsis's first job is to identify the smart people in the Wizards' organization and on the roster. There are bound to be some. And then he'll bring in other smart people to complement them.
And he needs to develop a plan, in concert with other people who have plans. Ernie Grunfeld has the ability to react to situations, but we don't know whether he has a master plan for long-term success (compare Jed Hoyer, the new GM of the Padres, who got hired on the basis of his plan).
If he has a good plan that works, great. Otherwise, Mr. Leonsis should bring in someone else. Mr. Leonsis probably already knows that it takes less time to build a winner in the NBA than in the NHL, though it's not necessarily any easier.
But in both leagues, you can get a lot smarter if you get the chance to draft and then keep a great player to build around. So build through the draft, trade for picks, sign players from the D League, and grab the best players who have played through their rookie contracts.