I don't comment much on the Mavs these days, but here's my take on the upcoming season. As many questions as assertions, really.
They have a tough time ahead. This is not a good season to be trying to scrap and claw your way into the bottom of the playoffs with a short roster. There are already 8-9 good teams in the West, which means that you have to get to 48 or 50 wins to make the playoffs and play a ton of games against really good teams to do it. 16 divisional games against San Antonio, Memphis, Houston, and New Orleans, then add 3-4 games each against GSW, LAC, and OKC... that's rough.
Nowitzki's minutes and points have gone down for 4 consecutive years. His rebounds and three point percentage have dropped 3 of the last 4. He was hurt last year, but he's also getting older. He's not a guy who is going to fall off the face of the earth due to age, but he's also not going to be a guy who can go out and get you 25-30 every night either.
OK, so bring in Ellis to be the guy who can go out and be the spark plug, manipulate the defense, be the game breaker during the regular season. Makes sense.
I can see the Ellis/Nowitzki pairing work really well... or really poorly. He and Ellis both like that midrange area and take a ton of shots, so one of them may have to change his game. Will Ellis accept reduced attempts or start going to the smarter "3 point or layup" offensive game? Will Nowitzki move inside, and if so can he stand up to a whole season playing primarily in the paint?
Can the Mavericks generate shots in the paint? Ellis takes 43% of his attempts in the paint, Dalembert 67%, Calderon 14%, Marion 71%, Carter 30%, and Nowitzki just 16%. With a weighted average on attempts per game, those players combine to average 38% of attempts from the paint. If Nowitzki's numbers return to where they were when he was healthy, the slightly higher % of attempts in the paint (20%) are offset by the increased number of shots. 38% is substantially lower than even notorious jump shooting teams like the Warriors (43%) and Bucks (47%). That is a big problem.
So is defense... Calderon/Ellis is a terrible defensive back court, and Dalembert/Nowitzki is not a particularly good defensive front court. Not good enough to make up for Calderon/Ellis. Could be rough.