So there was a novel that had some cool ideas and I really liked, but also there were many parts that made me annoyed mostly due to the genre, plot holes and inconsistencies and how they were done or used which affected the overall quality of the story. So while the ideas and story was good, there were clear parts that affected my satisfaction with the story and could have done better.
Now I was thinking of doing a similar story and reusing some of the ideas. The only problem is that while I am confident that I can change it up, there are quite a lot of parts I want to use from the story that inspired me, and while I can change them, the core idea is still there. Now if I was using just one idea it wouldn't be a big problem, but I want to use multiple ones from the original story some of these are cliches that have been used before, but some are also kind of unique to the original story so that using them together you would see the similarity.
However, I intend the overall story to take a different direction. For example, the original was a harem with poor and forced romance, while I am not going to do that and focus more on romance, but also I intend for my story to be at a slower pace and fill plot holes and avoid inconsistencies. Also I would be adding and changing a lot of the settings overall and put relevance on side characters.