I'd do it for the Mavs. Don't like it for the Hornets tbh. LaMelo is at his best when playing on the open court. Porzingis would slow down their offense. Needless to say, he ain't the ''unicorn'' anymore. The way I see it, he's just a floor spacer.
Don't like the defensive fit either. LaMelo is better suited in a switch-heavy defensive scheme. Porzingis can only be effective in a drop scheme.
Interesting idea though. TP to the OP!