Thanks to the wonderful playthrough by NeoSoulGamer, there have been a lot of changes to Trailblazer in the past few days. His playthrough highlighted a number of areas that the game could be streamlined and improved, but overall the core combat and story mechanics remain unchanged. To watch his entire LP of Trailblazer, visit him on YouTube, where he doles out great advice for any up-and-coming dev:
https://www.youtube.com/watch?v=6eNV3Hga8ww

Without further ado, the changes for  Version 0.02.00 are as follows:

 - Tumbleweeds added to various locales (thanks for the suggestion Graceless Gamer!)
 - Party Size increased from 3 to 4
 - Virgil's starting skills changed from Gunslinger to Trapper
     - If you already have Virgil in your party: 
          - Virgil's Skill Trees will be refunded to you
          - Coach Gun will be added to inventory
 - Cooldown removed from Hipshot, but damage and Grit gain reduced
 - Guns Akimbo now improves Turn Order similar to Hipshot
 - None Can Hide now deals more damage
 - Streamlined opening scene dialog
 - Bloody Bill's corpse now contains a lootable item
 - Attribute Tutrorial added to Danny Boy's dialog
     - Mettle renamed to Offense for better clarity
 - Reworked all Tutorials to better deliver important information
 - Created alternate path to find Jack during Scourge on the Frontier
 - Characters will now properly return to "Cover" stance after counterattacking from Cover
 - Claw attacks converted to single attack, while keeping same average damage
 - Reduced damage of Poison DoT from Hangin' Judge Parker
 - Defeating Hangin' Judge Parker also kills his Bailiffs
 - 5th Party Member and Posse Command now available in Hangin' Judge Parker fight
 - Fixed bug where Game Over ME wouldn't play at times