Fairy Tail: Celestial Spirit Mage

First of all, the protagonist has lived in the Fairy Tail world for ten years before the story begins, which is a failure in my opinion. After all, the author also said that it is mainly to smooth over the difficult feelings. So, what's the point of Lucy appearing according to the plot? Layla still died of magic depletion disease according to the original plot? Author, did you briefly mention that Layla helped the protagonist learn to use the twelve zodiac stars, and then let Layla die of illness? And Mirajane is still a gentle receptionist. Does this prove that Lisanna is still sucked into the world that lacks magic? Doesn't it mean that there is difficulty in letting go of emotions outside of the plot? Can't you be more original? If the meaning before these plot points is difficult to save, wouldn't the author not write it?

Full of creativity, the magic that uses the 12 zodiac signs as the stars is mostly used to travel through the past and use various dragon-slaying magics.