I live in CA, and the referendum was passed in part as a preventive measure when the political climate began to aggressively change nationally. It's because of CA's size and different types of population distribution that the action was taken. (Large rural areas bordering densely populated urban areas make gerrymandering easy. That's why it's a problem in TX, and why it's a concern here.)
CA's mandate actually has had good results - whether you realize it or not. Population distribution on maps has been shown to be fairly equitable within the state and we've had changes to our officials. Not sure you guys are actually reading how the intended bill (or existing referendum) is set up.
@Taymon even said the bill, "proposes a bipartisan panel." That's just not true. The actual panel for the "Let the People Draw the Lines Act" Is meant to be: 5 Dem, 5 Rep, 4 Independent. (The same as in CA.) While the two major parties do hold dominance, it is no way a "bipartisan panel" and the 4 independent votes are enough to sway either major party on decision-making.
For the actual results of the change in policy, you guys may want to read the Wiki page on the subject. Just check out "Results".