On Rondo's value - he's probably at 9 or 10 mil per year, assuming he doesn't improve much. He's got a great handle, can pass, plays good defense (even though he gambles too much), he can ignite teammates and the crowd with spectacular plays, he rebounds extremely well, etc.
Yet he is not a max player and probably never will be. A max PG needs to be able to carry a team on offense - Nash, Paul, Kidd (in his day), D Williams, possibly Rose. Rondo will never carry a team on offense.
In the open court he can cause havoc on both ends of the floor. In the half court against elite defense, his offense is very limited.