It's not that there's "lack" of anything, except understanding. "New" is in the eyes of the observer, the way I see it, there are very new and fascinating discoveries every year. It's more how the expectations aren't properly communicated. Like the article author writes:
"I fear a complex set of issues is likely to get over-simplified, and this over-simplified version of the book’s argument is all that much of the public is ever going to hear about it. "
It's all about for what the physicists can get the funding to explore. The biggest worry is the perception of "simple" public (some of which are actually deciding what is going to be financed) that there have to be "successes" however the "successes" are defined.
In reality, in physics, investing a lot of energy to find something and not finding that something can still be a point of a new beginning, and we had that in history a lot. Without Michelson-Morley experiments that didn't find what was "expected" there would be no Special and General Relativity -- these experiments were necessary. And the invention of Michelson still gives fascinating results: the first measurement of merging of black holes, only a few years ago, more than 100 years after Michelson's first experiment, used as the basis the concepts first invented by Michelson. We simply have to fund the experiments, and every properly done experiment is success, even if the results aren't what a lot of people expected to be.
There were the times where new paricles “appearing” wasn’t expected. Now the expectations were that even relatively small efforts must bring new particles. These expectations will most likely be adjusted.
Regarding financing, for example, the last time I've checked the total cost of everything LHC did, including building it and operating it for years, was around 9 billion of dollars. It's effectively nothing, compared to 1,500 billions of dollars (!) that are still planned to be spent on a plane that will surely not advance the science, famous F-35(!) (and much more is already spent than on LHC!) That puts some views in real perspective. One military plane could finance building and operation of one totally new LHC for at least 150 years, every year one new.