I agree there's room for more activities in there, though it depends on the presentation of the game; games which are text based or visual novels would be very easy to add activities and environments to, but isometric or first/third person games which present more of the environment visually would require interactive scenery and animations putting a large hurdle on implementing activities. I think dashnhammit needs to consider how this world will be presented by this style, each has it's own strengths and weaknesses that would make it more or less suited. Currently I'm playing Therian Saga which has a nice blend of presentations including map-based and static-avatar dialogue, it's not going to become the WoW killer but it achieves what it sets out to do and presents a nice vivid world within its limitations.
Exactly. When I went for my walk thinking about this worldbuilding idea, I was continually thinking, ok, how would this be coded, what are the strings of logic, what would the database look like, what are the fundamental variables, how to make the world alterable without rewriting the base code, how to code action processes and be able to insert variables into the action strings to diversify the experience (like, for a person with ADHD), etc.