Hi and welcome Eonstar!

I'm having a bit of a hard time interpreting exactly what it is you'd want changed, so I'll ask you a couple of questions.
1) - Is this for the base-game campaign? GM Mode campaign? Some adventure mod?
2) - What do you mean by 'Player Number'?
3) - What is he missing out on? Is it that he is playing as a henchman hired on Lady Vengeance, rather than one of the Origin characters, and by missing out on story elements, you mean the Origin character story he could have played instead of a generic character?
3b) - Is it that he's got too weak stats? Too low level?
No matter what it might be, I could write a quick little mod to fix it for you that way, although you'd need to also install a second mod from Nexus to enable achievements again if that's of importance to you. But either way, I'd need to understand what exactly it is that you'd want changed
Also, there's a
Larian discord you can come hang out in. I don't feel there's that many people frequenting the forums these days in the lull between new games. I go by the same name there.