The problem with the article isn't that the error rate it mentions wasn't a huge problem, it's that it's a huge problem Obama's apparently fixed. To quote the article on the post-relaunch website:
The site performed well this week, Bataille said. The site had no unscheduled down time and its page error rate was .77%, about the same as the past few weeks. Page load times were below one second.
There's no info in the article saying Bataille is lying, and you'd think if 10% of insurance applications were missing forms/had duplicates/etc. somebody would mention it.
One of the things I hate about America is that the pols never actually do anything terribly controversial. In 2008 US Health system had the British NHS for veterans, a typical Northern European system for Federal employees and Massachusetts residents, Canadian medicare for seniors (and yes, they're both called Medicare), and multiple purely American private health insurance systems (a small group market, a large group market, an individual market, hi-rick pools, and 50 slightly different state versions of each). Given that finance people run most of these systems, and finance people's major life-goal is revenue maximization, you had a whole lot of administrative costs (aka: finance people), virtually no cost controls, and nobody who thought about the situation for more then two seconds was surprised that a) the Federal government spent more per capita on healthcare then governments that actually cover everyone, b) many people were not covered (or had shitty coverage), and c) costs were increasing at ridiculous rates. Firing finance people and making Doctors the key decision-makers wouldn't help much because Doctors are convinced that everyone in their sector should make as much as a comparatively educated finance weenie on Wall Street, which means they don;t say know when the ridiculously overpaid specialist demands a $50k raise. To fix the mess you'd either need to remove most of the sources of finance people, or replace the finance people entirely with government bureaucrats who think that nobody should break $200k in base salary because the CEO (ie: President Obama) only make $400k and the Board of Directors (aka Congress) only make $174k.
So Obama had a fairly huge problem to solve. People who needed and wanted insurance weren't getting it, sometimes because they were poor but not always (only a fool agrees to insure someone whose breast cancer is in remission for the sticker price), many of the ones who were getting it were getting shitty insurance, and the finance weenies running the various systems were bleeding the country dry. But he can't get rid of most of the system because this is America. The VA, and Medicare are untouchable (unless they want more money). Large group policies from big employers are untouchable because the majority of the country uses them and would totally freak out if they changed even a smidgen. So Obama decided to rationalize the small group and individual markets, which guts the majority of income for finance weenies (prior to Obamacare it was possible for non-medical costs in those plans to be 40%, that means finance weenies got 40% of your premiums, now that's capped at 20%). But to do that he had to eliminate the existing markets, and to eliminate the breast-cancer-survivor problem he had to make insurance mandatory.
As a result we've got health cost increases in the relatively reasonable sub-10% range, the website has an error rate of under 1% so by this time next year almost everyone will have reasonably priced comprehensive insurance, and pretty much the only thing Obama had to give up for it was his current image.