I think the change says more about competition between the crowdfunding platforms and Kickstarter's desire to stay in front. The review process doesn't scale well and as mentioned above it's questionable the impact it had on the quality of campaigns and their subsequent success rate.
In general I think CF platforms in a bind in that from a revenue perspective that want to be perceived as a storefront for gadgets, but they can't stand behind the campaigns. From a consumer/backer POV, the platforms are not an advocate; they take a cut of the money and refer backers to the campaign. From the entrepreneurs view, they have to wonder if the service they get from the platform is worth the cost. Primarily the entrepreneur needs to drive traffic and press coverage to the platform. When the campaign ends, they suddenly need to shift traffic they've been pushing to the platform to their own site.
It's possible the quality on KS will go down as a result of the change. It equally possible it will boost revenues and lower overhead. CF has always been about the idea that there's a huge supply of great ideas out there that didn't have an avenue to get funded. The platforms have helped HW development become fashionable, and that's bringing investors back to the table. That good news for entrepreneurs who have built a credible development team.