http://www.youtube.com/watch?v=Sh1DalWSuAcI don't think Harris makes some of those simplistic plays that Kidd does. Those two passes to Terry for good looks at three? Maybe I'm underestimating Devin's PG ability (he was really getting there before he got dealt), but he's probably not making those passes.
The thing is that the Mavs aren't a ball-movement team without Kidd. They're full of guys who look to create their own shots - it's not like they have a Brandon Roy there who does both. I always argued that Devin was a better fit in Avery's system than Kidd: because they played a lot of iso and two-man game, and didn't need ball movement all that much. The Avery Mavs got away with a lack of ball movement (from 05-08, I don't think any Mav averaged more than 6 assists a game) by not turning the ball over and playing really solid D - uptempo doesn't let you do that consistently enough.
I think it's the same for Mike Bibby. Look at what happened with him and Jason Williams. I'm guessing the 01 Grizzlies starting lineup included Michael Dickerson, Shareef Abdur-Rahim, Othella Harrington and "Big Country" Reeves. I looked on BR and totaled their AST% to about 40. The 02 Kings, who had Divac and Webber, two of the better passing big men to ever play the game? Around 59. That was a team that was much better at spreading the ball around so naturally Bibby's assists went down. Then looking at Williams, who went from a similar roster to Memphis? His AST% shoots up to around 40 playing next to Pau, Battier and Swift.
What I'm trying to say is that the Mavs need Kidd in this situation to do what he does in a system which stresses ball movement. I hated the trade at the time because Harris did exactly what he was supposed to do for Avery and I knew Kidd just couldn't beat anyone to really be an upgrade.
EDIT: Is it just coincidence, or under Avery, the Mavs had been great with pyth. record, and now with Rick, they look really dodgy with it?