I don't get that article.
Although many people believe the legislation provides for no "public option," the ACA requires the Office of Personnel Management to sponsor, through private firms, two health plans, and those plans are indeed public options that will be advantaged by larger taxpayer contributions and exemptions from critical regulations imposed on private insurers.
That is an oxymoron. Health plans done through the private sector are not public options. The public option was a public plan tied to medicare. A big reason it was taken out is medicare reimburses at lower rates than private insurance, so the storyline described in the OP was likely to happen. I saw studies showing close to 50% of people would be on the public option plan by the 2020s since it was 20-30% cheaper than private insurance (I think the quotes were $5000 a year for a private insurance plan, $3900 for a public option tied to medicare for coverage for a single adult).
I think the article in question is describing Co-ops, which are not the same as a public option tied to medicare.