Yeah, more won't hinder us!
Well, I don't know about that. I've played in and GM'd a good number of games, and there's a sweet spot for headcount that going beyond absolutely degrades the experience for everyone.
But that's not to say we can't have more than one party active in a shared iteration of the setting, with actions that effect each other. It'll just mean a very busy Shevvie or having more than one GM, with a little collaboration. Or even just multiple, unrelated groups.