1)Re- hire MDA, who I think would work very well with Kurt Ram (he would essentially be the D coordinator). The triangle and "7 seconds or less" is like Bonnie and Clyde, a match made in heaven (see GSW)
2)Trade lopez, and 2019 1st pick for D Russell, and JJ Hick. Russell is going to have leave LA, the trust is gone from that circle, it's toxic, and BYRON SCOTT is not Phil.
I know it's sounds far fetch, but if Phil and MDA had a sit down, their philosophies (as far as basketball) are very much alike.
Melo is basically playing like MDA wanted from jump, and KP would be a All star for sure with MDA at the helm, keep majority of the roster, (can you imagine, grant and D will in a uptempo system like that).
I would keep most of this roster intact, dismantling it (more than 2 players) would be a massive set back.