I'm going to basically state reasons why this is a terrible idea.
1) Lonzo is has played in 52/47 games the past two years. That is borderline awful.... You cannot depend on him to stay in games, nor can he even close out games, because he's shooting 43.7% from the free throw line! Even Rondo, someone we notoriously hated on constantly for his lack of FT %, was shooting at least 10-20% better in all of his seasons with the Celtics. His worst year was 39.7% and I believe he was playing through a recent surgery of his hand.
2) The drama that comes along with LaVar Ball is not worth it. Also someone mentioned if LaMelo was apart of the package deal, you would do it. Why? Lonzo & LaMelo have the worst shooting forms I've ever seen, and LaVar is certainly a huge reason to blame for that. The way they shoot wasn't conductive to NBA success, and it doesn't bode well for their bodies. They would need to re-vamp and basically restructure their entire shooting forms.
3) Lonzo cannot shoot, cannot score from the FT line, and his passing while amazing is only served best on the fast break. His passing vision is great, but what's the point if people are just going to give you space, and force you to shoot? Did I also mention 31.5% from the 3 while taking about 5 3PA per game? That's just awful.
Talent level is comparable but it would be a far worse fit for the roster so I wouldn't do it.
And how did you come to this conclusion...?
In what universe is Ball even anywhere as talented as Brown? Brown may not have the best handles, or BBIQ, but he's certainly played more games, be a consistent contributor to a contender, can space the floor, and has better vertical/athleticism.
Honestly, besides passing, and handling, what does Ball even do better than Brown?