Lebron will be the LA alpha. Lavar will probably be much quieter (his son will beg him to keep quiet so he doesn't get traded for being a nuisance via family member). Lavar doesn't hold back but I don't think he'll confront Lebron. In fact, we haven't heard peep from Lavar since Lebron to Lakers came across. Or, Lavar will keep up his diatribes and Lebron will just laugh the guy off in a way that others have failed to do successfully...
I disagree that Rondo and Lebron are a poor fit. Lebron's life will be easier with Rondo's brain and ability to direct people and set guys up. And Rondo will set Lebron up for easy buckets in a way that Lebron has never had before. These are the two highest IQ guys in the league on the same team (or 2 among the highest).
So Walton gets his wish for a stifled Lavar, but also has to put aside his personal coaching vision for 3 to 4 more years. He is now, or should be, a coach that lets Lebron and Rondo lead. he should manage the personalities. That's his new role for a good long while...and he should stand up to Lebron on minutes...resting/saving Lebron for when it matters and not letting Lebron overplay himself in the regular season. Well, Walton can do his vision in practices. But during games the vision will be blurred with lots of Rondo and Lebron self made schemes...and if Walton is a good coach he'll defer to Rondo/Lebron on a frequent basis. Walton can plant his roots while the already developed garden runs the show...
Then, one year from now they'll sign K. Leonard.....