These ideas all made me VERY excited!
I toyed around with some ideas for travel challenges in the core rules, but didn't want to bloat the rulebook too much. I'd love to see your take on the idea! That, and the idea of social resolution to conflict is also really cool!
8 new shells also sound amazing!
You know, some people from the RUNE community translated the original RUNE rules into a bunch of different languages; I bet that there might be someone out there willing to help make a French version of SHELL, or to help translate your realm to English! The Gila RPGs Discord server is a treasure trove of helpful people and information.