Well, won’t this just mean that the two big money special interest-funded blandidates will always advance?

Money creates name recognition, which is particularly important if voters can only show support for a single candidate: such voters are strongly incentivized to support only a front runner/well-funded/well-recognized candidate.

As long as the 2015 Legislature fulfills the equality intent of the Oregon Open Primary and removes the single choice limitation, voters will be able to show support for all favored candidates. Consequently the name recognition/electability factor becomes a less dominant consideration, voters can be more honest about their preferences, and underdog candidates have a better chance to advance.