Chinese netizens upset that a significant change was made to original 'You Who Came From the Stars' plot

The widely loved fantasy rom-com series 'You Who Came From the Stars,' which is currently being aired in China, is upsetting Chinese netizens for a slight yet significant alteration in the plot. 

A Chinese media outlet reported on February 3 that some viewers are upset over a minor change in the original story, particularly over Kim Soo Hyun's character Do Min Joon. The said change involves changing Do Min Joon's character from an alien to that of a regular novelist, who presents his lover, Cheon Song Yi, with a book that chronicles the events in the original Korean drama. 

What do you think of this change in the drama? Is it enough warrant complaints from Chinese netizens?