I'm sorry to beak your hopes, but that has 0 sense. Genre roots has nothing to do with this, although you might wanna check timelines to be sure what are RPG roots. I don't have to do that cos I'm old enough to remember how RPG (console and PC) gaming started. Anyway, these games can't be compared in any me known way. "More open-ended approach" usually means only 2 things, they took an engine, existing world and generated another exactly the same random game, gave it a name and here you have a new RPG. While if JRPG is new, it usually has - new characters, new leveling system, new story, completely new world and new roles to play.
RPG is role playing game, not creating role to play game what US developers seem to think. That's my opinion. JRPGs never left RPG roots, while PC RPGs with very few exceptions never were nowhere near that roots.
Very sorry for off topic :greenie: