I do really like Vucevic, he has improved alot since last year, even with alot more minutes. His Rebounding shot up from 14.5 rbds/48min to 16.9 rbds/48. Also his TS% went from abysmal at 46.2% to a slightly above average (for a C) 53.9%. And with less fouls and more points per 48 min. (on less shots!), it equals out to a much better Wins Produced per 48 (.152 WP/48 this year, quite good). He is far and away the best player on the Magic.
All this said. Rajon Rondo is dominant and an absolute superstar. I don't care if the Celtics win an NBA Championship without him, his is a stud. His career average Wins produced per 48 is .219! Thats more than twice as productive as a replacement player. Even for all his shooting woes, his 2pt% has been higher than the average point guard every year of his career. His TS% though is slightly below average due to poor FT and 3pt shooting. Still not bad for a guy who averages 14.2 assists per 48 (and assists aren't even as much of an effect on Wins Produced than say rebounds or points). Totally great player.
I would want Maurice Harkless, Tobias Harris, Vucevic plus a first round pick at least (maybe swap picks for the second one or make it very conditional)