My impression of Maugham as an adventurer is that he liked adventures that were comforted by European conveniences. He needed the presence of European colonial order, including European people, comfortable housing, and submissive native servants, to make his journey into Southeast Asia enjoyable.
It’s this imperial attitude that is reflected in the stories of Ah King. The natives, the indigenous culture, the history of the lands are all ignored in favor of rather mundane depictions of Maugham’s colonial peers. There was no local research that went into these stories. In fact, all of these stories could have easily happened within European countries while maintaining the same plots and outcomes. They are only colored by their Southeast Asia setting.
I once read that Maugham journeyed to Mexico to develop similar stories from that far away land, but found the experience wholly unsatisfying. Given the content of Ah King, I can see why. Maugham would have found Mexico practically devoid of any European transplants to write about. He would have been forced to interact with the native people and to tell their stories, which appears to be the last thing that Maughan would have wanted to do.
Overall, this collection does not bode well for Maugham as a short story writer. When thinking about his novels, I remember him best for the complexity and realism of his characters. Of Human Bondage and The Painted Veil are examples. In these short stories, there seems to be not enough literary space to develop his characters to that level of life. As such, with the exception of "Neil MacAdam" they all suffer from character stiffness, which in turn makes these stories far less engaging than his novels.