These are all great ideas and feature suggestions!
- For 'roll twice and combine' - that would be tricky to implement programmatically, but I really like the idea of it and will look into how I can make that work. I've added an issue on GitHub to work on this.
- It sounds like your second request can already be solved if you create another table that has various math options, then you set an item in your second table to pull from that one. Perhaps I'm not understanding your needs there fully.
- For the fantasy magical feature generator, you could create separate tables for each thing, then a 'master' table that pulls from each of those. I don't think you could do that with one-click though - it would likely need to be at least two separate roll tables. I would need to think on that some more to see what would make the most sense.
- You can have a tabbed interface for choosing tables perhaps - that's what I did for the Kiwi Acres toll tables. The tabbed UI comes from a different plugin.
- I can certainly allow HTML in the results - for security and formatting reasons I would likely limit it to certain tags, so I'm thinking it would be links, images, and maybe one or two other things. I've created a GitHub issue for this too.
This all sounds great and would be neat enhancements - I'm not sure how I could build all of it, but I'm sure I can find a way! Thanks for your feedback and for sending in these requests.