Here is what the current rotation looks like compared to last year...
PG- Kidd, Barea
SG- Howard, Terry
SF- Marion, Ross
PF- Nowitzki, Thomas
C - Gooden, Dampier
last year...
PG- Kidd, Barea
SG- Wright, Terry
SF- Howard, Singleton
PF- Nowitzki, Bass
C - Dampier, Hollins
Mavs lost: Bass, Wright, Singleton, and Hollins.
Mavs gained: Marion, Gooden, Thomas, and Ross.
Marion > Singleton
Ross = Wright (although its potentially an upgrade, as Ross is a of a defender and supposedly has a of a 3pt shot nowadays)
Gooden > Bass
Thomas > Hollins
Mavs have definitely upgraded so far. Let's see what their next move consists of.