If you think that Rondo won't make the Mavs better you're completely delusional.
How much better does Rondo make them? They were 19-8 before he got there, so will this improvement translate in wins and losses? If so, by how much?
This is a team of jumpshooters with multiple three point threats
Who are these multiple 3pt threats you speak of?
players that can create their own shot.
Yes, they have players that can create their own shot and during crucial moments their bread and butter play is Ellis and Dirk in a high pick and roll. So how does Rondo exactly help them?
They have a top 3 NBA coach and a deep roster.
Carlisle is good, but you seriously think they have a deep roster?
In fact I can't think of a team that would suit Rondo's abilities better.
Maybe, but that's just because Rondo is a bad fit on most teams. He needs to be on a team with a bunch of shooters, especially ones that don't need the ball in their hands (like Ellis), and he can handle the ball the majority of the time. The Big 3 team was tailor made for his strengths/weaknesses, but finding that type pf team will hard to replicate.
Also, if you think Rondo is a poor defender I suggest you look at the Celtics point differentials when he's on and off the floor the past season.
Yes, he is. He gambles way too much, allows players to drive past him in order to get the reach around steal, and too often switches or gets hung up on pick and rolls because he doesn't fight through them.