The article describes one potential solution.
I didn't see any solutions, to be honest. Just the standard theoretical solution to the tune of "If ALL top scientists in some field ALL jump ship at the SAME TIME to a few select open journals.....", which sound so nice in theory.
I have invested 25 years in my education and sacrificed everything for that one chance of becoming a scientist and doing what I really wanted when I was a kid. My friends drive fancy cars, have houses, I have a guitar, a used car, bills, and an 80-hour week, no holidays, constant stress to the point of impaired short-term memory. All for that one shot of becoming a professor.
Imagine that I get a nice, important result. I have two choices -- publish it in the most prestigious journal imaginable, or go with the feel-good factor and a more open journal. If I make the wrong choice, I'll be flipping burgers for the rest of my life because nobody wants someone like me: old, overqualified, no work experience, no interest in anything but science.
The way I see it: I have a couple of years to land some important papers. Can I do something to make the open journals more prestigious than the best ones in the field? No. So it's an easy decision.
Things are changing, but it's a slow process, because prestige and contacts have a lot of inertia. I hope that things are different in 10 or 20 years. Right now anyone can email me and get a copy of any paper they want anyway, I won't sabotage my career because it might buy me slashdot reputation.