It seems to be the way it's going. I'm finding when I do my searches that Saver fares are fewer and far between compared to even a year ago. The wise heads on the forum suggest Saver fares might become available closer to proposed departure time and advise playing a waiting game until they (might) become available. It also seems that the disparity between Saver and Flex prices varies considerably (with route and probably time of year and demand for tickets etc).