Pippa Smart has published "The Big Picture: Scholarly Publishing Trends 2014" in Science Editing.
Here's an excerpt:
Technical solutions have attempted to address the growth in research but have sometimes added to the tsunami of information and increased the need to manage quality. To this end experiments with the traditional quality control and dissemination systems have been attempted, but news of improvements are frequently overshadowed by alarms about ethical problems. There is particular concern about some of the new publishers who are not adhering to established quality control and ethical practices. Within a potentially fragmenting system, however, there are also emerging collaborative projects helping to knit together the different elements of the publishing landscape to improve quality, linkages and access.