Last year, neither Forbes nor Murray looked like they belonged in the NBA. This year, Forbes looks like he belongs and Murray looks like he may settle in as a 2 rather than a point guard.
Forbes works really hard on defense, maneuvers around well in the midrange game, and generally decisively makes the right pass/shoot/drive decisions. He's not an overwhelming talent, but is a nice piece.
Murray is still mostly upside. His point guard skills are nowhere to be seen, but I love the way he can get to the rim and attacks the glass on both ends. Defensively he's got quick recovery and great length but still hasn't parlayed those physical capabilities into consistently good defense. He comes up with more than his share of disruptive plays, but he's not really a stopper and can't navigate screens.
Anderson has really surprised me to the upside. The point-post experiment last year didn't really work because even with the extra weight he was weaker than posts and slower than everyone. Now that he's slimmed back down he's substantially better as a slow, smart, oversized perimeter player. He has benefited more than anyone from Gasol settling in defensively. Anderson is plenty smart enough to eat up space and funnel faster guards and wings into the help defense as long as the help defense is doing its job.
Bertans seems to have worked his way into the lineup, but will presumably disappear again when Gay comes back... not sure there are enough minutes for four 6'8 to 6'9 combo forwards even though Bertans does a lot of things really well for a second team forward.