OneArmedImmortal
TBH I started hating Naruto fanfics because of how rinsed out the eye powers since whether it be the sharingan or byakugan both will become useless once MC unlocks divine sense. Hope MCs abilities are interconnected and mutually benefit each other and are not just some random abilities stacked together or else it would be a waste of such interesting protagonist
I get "going slow" so giving him a not OP ability, except for one very important detail: This is a fanfic. If we want the "going slow" not OP ability.... read the original, seems obvious. Especially in this case since original MC has special EYE power, and new MC also has only EYE power (at least title says EYE and not EYES). And I feel like the eye he got was hyped a lot compared to what we know it can do at that level (not fandom "it can do" but from original, which is not much). This fanfic is not going to be 1500 chapters, so to speed up it would need to be OP abilities or OP plot armor, this seems to be plot armor, suddenly his talent is better, he progresses faster than others with no explanation etc. With the quality of the writing, the effort you go into the internal monologue and details on everything, while making the story feel far to slow for a fanfic, I keep wondering why not write an original. With name changes and not mentioning the other MC this could be a new novel.