Originally posted by johnnybigdicks
I think these are some great illustrations of the building mechanic that needs some fine-tuning. Thanks for putting this together.
We're definitely looking at making some improvements, but we need to be careful not to disrupt the muscle memory we all have for the existing building system.
In the short term, we are currently testing a change to how placement of walls is selected. If placement is blocked (red) because of lack of structural support, then we'll search closer to find a spot that is structurally supported. The last segment of OP's video shows the problem that this change attempts to correct. If all goes well with testing, we'll have it out to you in an upcoming patch.