While I agree with the PNHP that single-payer is a preferable approach, the OP's source is a "critical from the left" group. Here is a Kaiser Family Foundation explanation of the cost-sharing for premiums, deductibles AND co-pays for lower income Americans which I think is both more clear and a fairer assessment.
In Addition To Premium Credits, Health Law Offers Some Consumers Help Paying Deductibles And Co-Pays - Kaiser Health News
Our max OOP went up $5K while our total yearly premiums dropped $5K. That seems a win to me. Guaranteed issuance for continuous coverage has some drawbacks. (Texas, with it's extremely high rate of uninsurance, is surely not an example of good policy). What happens when you move between states? What happens if you have temporary financial problems and can't afford coverage for a while, etc.? I had a patient who let her COBRA eligibility lapse after she woke up one morning and found her husband lying dead next to her. She became deeply depressed and let everything lapse. Then she was unable to get insurance because of her history of depression.
I had continuous coverage for my auto-insurance before being sent overseas by an employer (to work for the US Army!) and was told that I would have to get coverage from the assigned risk pool due to the "lapse in coverage" until I examined the tiny print on my German policy and discovered that I had unwittingly purchased insurance from an Allstate subsidiary. After that Allstate had a hard time making the claim that I had been uninsured. I have a hard time trusting the good intentions of the insurance industry.