Thank a lot for your detailed review!
1.More interactive would be good indeed, but the mechanics are pretty simple (moving, buying cards, moving) so once you have done all that once during the tutorial, its all about the small details that you need to understand the game. Then the story mode should be the way to go because the first AI is not really strong so it helps you find your own strategies in the game.
2-3. Definitely! Im thinking some animation over the images at least could help.
4.Indeed, my interpertation of the theme follows some of the example of the main page, as I chose to include the theme in the gameplay mechanics (fighting over the controls of a territory) and in the pvp aspect, while for the subtheme companion, I included it in the gameplay mechanics and in the story.
Thanks again for the constructive feedback, I really appreciate it