From the publisher:
In the second printing of the game, we've improved the clarity of the rulebook, updated layouts with additional visual cues and reminders, and fixed some minor errata that came up in the first edition. Miniatures will be re-cast and updated to use the base-and-ring system popularized by other mainstream miniatures games on Kickstarter.
All updated cards, as well the updated miniatures and base rings, are included in the Upgrade Pack available at the Alumni Tier. For first-time backers, these things are all included in the second printing of the game already.