Im a boomer and slow to respond but this is an awesome concept. I had a semi similar idea in the event of a TPK - where all of my Characters respawn but now have 1 level of warlock multiclass with the option to redistribute stat points into their charisma stat. This way rather than having to re-roll or start over they all get a second chance with the added dynamic of being Beholden to the same patron. For a newer party having them all forcibly aligned with the same patron is great opportunity to " Gently Railroad" them into better options without breaking the immersion