Here was my take on the characters:
nuKirk: Excellent. Chris Pine worked in some subtle homages to Shatner (his speech--attheendof...the simulation was...pureShatneresque!), and I could hear in his voice a young Kirk.
nuSpock: Excellent, for the same kinds of reasons.
nuBones: SUPERB! Urban had DeForest Kelley DOWN.
nuScotty: Pretty good...but I'd love to see him in some good serious moments in the next film. Have him grow some hair a bit, to look more like Doohan. Pegg seemed to have a bit of a buzz cut in XI....
nuSulu: Okay. He wasn't characterized too much in XI. Here's hoping next film will show us more of the playful, adventurous Sulu we know and love.
nuUhura: Eh...okay, I guess, but...it seems as if they jettisoned the classical characterization Nichelle Nichols gave her, in favor of a modern stereotypical "cool gal". Hope they tone down the "attitude" in the next one. Keep the confidence, but give her the sweet side Nichelle gave her, too.
nuChekov: Ah...well...he was way too much of a "comic relief" character. Lay off the "GOO-GOO-GOO-GOO-GOO! I KEN DO DAT! I KEN DO DAT!" with arms flaying around. Tone it down, already, and have him take himself a bit more seriously. Lose the "Sing-song" tone, most apparent with his announcement to the crew. And please...grow the hair, and comb the curls out!