Version 3.2 of alpha was released instead of the previous 3.0 and 3.1 because they just weren't good enough. 

3.0 came with a revamp to all the maps making the game look much better and make the scale of the maps much larger. the games playtime has been increased by quite a few hours an average playthrough of the game may take about 12+ hours to defeat all the bosses. This is only the Act 1 part of the story there is still a ways to go. 

MANY many bug fixes and dialogue fixes have come with this update as well as many minor additions. 

There's probably a lot more I just can't think of it been working on it all day.