Yes, that little part that sticks up demands a whole extra wall in height. You are correct in saying that is the part that I am requesting that they change so that it sticks up only three walls high.
And no, not just my base. I’m requesting a game change for all players so that all players with bases benefit from the change.
While its not clear in the image, the base I constructed was just foundations, walls, ceiling tiles and two furnaces. Its not a complete base; just a test. My “base” does not exist; it was a new character on testlive to test the furnaces. So the request isn’t for “my base” – its for all bases being crafted in the future by all players. But I can see how you would jump to that conclusion given that there are players who only think of themselves and the lack of context information surrounding the rest of the image in the picture.