I'm 20 chapters from finishing the raw material, so I can probably give a solid opinion. Summing up an interesting start to a subsequent tedious development, this flaw is very similar to novels of the same type, such as "48 hours a day", due to the paradigm shift and the different MC time flow, we end up seeing an apathetic main character.
During the chapters that he is with the family you can observe him with feelings, but this is forced by the author, if you spent decades or centuries living as a monarch, sect leader, mercenary or anything else, you would immediately be able to recover your previous behavior and all feelings towards your family? Certainly not and this is one of the novel's biggest flaws.
In addition, it is essential to point out a lack of worldwide development, 300 chapters and are practically the same -_-, if you expect development of secondary characters give up, due to the speed that it changes from one world to another it is basically impossible to develop a character deeply.
But although this criticism, it is still a decent story compared to the other webnovels put on trials in previous times, the MC is not an asshole, we have a wide variety of cultivation systems, without harem and lastly an enemy that although it makes the story goes fast, makes us observe several worlds of cultivation.