Make no mistake this change was about money not "customer satisfaction"!
In about 1998 ASA carried out a survey of users regarding various services. In regards to ERSA the response was almost entirely positive in terms of it's size and ease of use (90%ish I recall). In light of that ASA, despite the extra cost (there is a large waste of paper due to the unusual size), stuck with the "well liked" existing format.
Now with a bean counter installed managing the publications area we see ASA abandoning the old format. Interesting that in doing so they did not take the opportunity to make some of the actual changes requested in the survey including Tabs, an effective index and a more appropriate sectioning of information.
Try asking for a reduction in your subscription now that it is cheaper to produce!!