anyways, I've been planning to write something (rewriting about lvl 10+ something champ tired being a deadbeat father and resetting the world because he can).
So give me some suggestions please.
Assuming things haven't changed much from when I stopped, have it play straight up until the point the PC meets the first village's authority figure. As said PC talks about the role of Champion of the Village, he feels a piece of armor present in the room call to him.
PC asks about it, the countess (I think) acquiesces and he wears it after he leaves. This armor gives him a strong drive and motivation... because it's the souls of fallen PCs (could be a nod to the save wipes, canonical excuse would be that the demoness I forgot the name of decided to set those souls aside in that equipment so as to save them for a banquet or some shit) who in turn give this PC the knowledge of several things - among those, his status as a coadjuvant - which makes him decide to take a more active role out of spite.
By doing so, he starts pulling the strings in ways that mess with the status quo to the amusement of the cat deity that happens to be in the first village and displeasure of others, specifically the demoness who now knows PC stole her stash and will sabotage all of her operations.
I think you could show that change by having him seriously upset the kitsunes via challenging and embarrassing them, stuff like challenging the self-insert to a game of chess and beating him handily by having the souls process a winning strategy that decimates his ego. He'd also remember about the deadbeat plot and figure a way around it like... I dunno, pulling the wife and kids from their dimension through alternative means.
You could also show his protagonist capabilities by developing that castle he gets down the line into a proper village... possibly by sabotaging the elves and their princess.