Hello there,
this title is incorrect:
1. This is a lettered update, not a full version update (mostly bugfixes but got some content added)
2. All the content for 1.8 and the added one to 1.8B are in 1.8E since after B it was all bugfixes.
3. I don't think a 10 second task to clean the window is considered too much work but that would be your opinion (you can ignore the minigame and just really not do it)
4. There are more than just those 3 things you mentioned (check the guide if need guidance on how to get the new things) and again do remember this was a lettered update, which are normally just bugfixes.