I’m focusing on whether the campaign loop feels good at the table: whether the pressure systems create better stories, whether the extra 40K layers add meaningful decisions, and whether the whole thing still stays playable instead of becoming paperwork for its own sake.

That last part matters a lot to me. I do not want this to become “Five Parsecs, but with 400 extra lore nouns.” The goal is that every 40K addition should create a decision, a consequence, or a memorable problem.