- You can try customizing hex numbers (Grid > Customize...) to improve readability.
- Hex orientation affects the generation too much (e.g. the "same" island in different orientations may consist of different number of hexes), so it's impossible to build exactly the same map in a different orientation. It's neither a feature, nor a bug.
- "Rugged" affecting anything apart from the coastline itself is a bug - I'll look into it.
- Not sure I get what you are doing with the url. What parameters would you like to change without changing the seed?