Can the ACA exchanges steer customers away from bad choices?

An important feature on Healthcare.gov -- improved for the new open season, I believe -- could steer significant numbers of users toward plans best suited to their needs -- and perhaps point a way towards solving the "auto-renewal" problem, whereby existing plan holders may face steep price hikes if they fail to comparison -shop.

The feature in question is addressed to those buyers who are eligible for Cost Sharing Reduction subsidies, which lower plan deductibles and out-of-pockets costs for lower-income buyers -- but only if they buy silver-level plans, which will cost them significantly more per month in premiums than bronze-level plans.

Lower income buyers who choose bronze plans, which have lower premiums, can forfeit thousands of dollars' worth of CSR benefits. Fortunately, the vast majority of CSR-eligible buyers do seem to have found their way to silver, notwithstanding premiums that can be tens of dollars per month higher for individuals and over $100 per month more for families.

Dave Chandra, a Senior Policy Analyst at the Center on Budget and Policy Priorities and a Certified Application Counselor, tells me that this year, if an applicant who qualifies for CSR takes steps toward buying a bronze plan (or, less probably, gold or platinum), a prominent pop-up message will warn her that she is eligible for CSR and will forfeit it if she proceeds. Here it is:

No, Virginia, ACA administrators do not need to "retain" the prior 8 million signups in 2015

Tis the season for preview articles spotlighting the challenges of signing up more uninsured and retaining the newly insured in Year 2 of the Affordable Care Act. The New York Times' Reed Abelson, in an otherwise excellent overview, repeats a common fallacy:

the Obama administration is expected to try to persuade about five million more people to sign up while also trying to ensure that eight million people who now have coverage renew for another year.

No one can or will try to ensure eight million renewals, because a very large proportion of 2014's enrollees -- perhaps half or more -- will not need to renew their coverage. They will be covered by new employers, or new spouses, or newly employed old spouses, or they will lose income and become eligible for Medicaid, or they will go on disability, or die, or, or, or...