To clarify what Minoanon said, the option to be cruel to Asterion is an optional but important part of the game, and the content from the previous builds is going to stay there.
When you get to the end of 0.3 the game will split, if you treated Asterion well you will continue to build 0.4's content and the rest of the game from there, but if you got the bad ending you will be directed to content specific for the cruel master that wraps up his story. As you see in 0.4, Luke and Kota won't even tolerate the player having the option to mistreat Asterion and will quit if he doesn't accept the ring contract, clearly there's no way the story can carry on like nothing happened if you abuse Asterion. It's gonna need its own conclusion.
We're really happy to hear that you gave this route a shot and understand the purpose of that content, even if most players don't want to see it (which is perfectly valid). Hope we don't disappoint with 0.5's content.