But Oregon, unlike Washington or California, also Democratically controlled States, continues to have partisanship in control of actual drawing of the Districts.  

Those two neighboring States have independent commissions doing the drawing.  Do you support that?

The new Oregon Secretary of State has a Task Force on the subject.

http://sos.oregon.gov/Pages/independent-redistricting.aspx

If you look at his map,  partisanship controls in most of the United States, not just in the plains low population States.  Unless you think New York and Pennsylvania are low population plains States.