Duhon isn't that good offensively.
He cannot beat his man off the dribble.
He has below average speed for a 6"1 PG.
This leaves Duhon stuck on the perimeter a lot as a spot up shooter( a shooter Duhon isn't).
Offensively Duhon is VERY limited.
Duhon is a defensive specialist, not a NBA starting PG.
Listen to this:
Duhon is a PURE PG, yes. Why? He can only play the PG position.
What kind of level of pure PG Duhon is?
C level at best. He isn't Paul, he isn't even Andre Miller. Hell, Sessions/Arroyo/Knight > Duhon.