Hello, thanks for your feedback! <3
In order:
1. Right. We did not have time to do everything on time, so we had to sacrifice the loot that comes out of the new mobs. Agree, it's better than sacrificing the whole quest.
2. Changed in 0.46: Goblins have 15% dodge chance. Arachne has 20%.
3-4. Let's think about what we can do with it.