As a mangaka,
I'd have a particular character as the lead character of the franchise, however, the franchise will not be limited to that character alone, because that's just boring. Every story typically has a lead character.
PRomised neverland,
It was 3 characters presented as main characters, with the orange haired girl being portrayed as the lead character. They all had significant panel time, until they separated, with the lead character having the most panel time, which is typical. Now with sarada and mitsuki...lmao, their shine has been taken away. They don't seem to be anything more than "showy" side kicks, specifically to serve some critera with no real purpose behind it. Like he was just trying to get them out of the way, to get to the main attraction...and that's entirely too repetitive...cause people are tired of boruto, especially if his own character can't move forward with his own development of hidden powers. I've yet to see the curse mark develop further, or his jougan activate.So much procrastination.
So then, move on the next character, and let the alternative main characters, Sarada, for instance, step up to the plate. That's how it goes, when it comes to being less predictable, repetitive, and having character diversity. You can do something else.
Not everyone is gonna take a liking to Boruto, lmao.